diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
index e068d8a..d98fa5f 100644
--- a/bpf_progs/netd.c
+++ b/bpf_progs/netd.c
@@ -446,11 +446,6 @@
         return match;
     }
 
-    if (key.tag) {
-        update_stats_with_config(skb, egress, &key, *selectedMap);
-        key.tag = 0;
-    }
-
     do_packet_tracing(skb, egress, uid, tag, enable_tracing, kver);
     update_stats_with_config(skb, egress, &key, *selectedMap);
     update_app_uid_stats_map(skb, egress, &uid);
diff --git a/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp b/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp
index cdcb0f8..64a7a98 100644
--- a/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp
+++ b/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp
@@ -126,7 +126,13 @@
         if (!statsEntry.ok()) {
             return base::ResultError(statsEntry.error().message(), statsEntry.error().code());
         }
-        lines->push_back(populateStatsEntry(key, statsEntry.value(), ifname));
+        stats_line newLine = populateStatsEntry(key, statsEntry.value(), ifname);
+        lines->push_back(newLine);
+        if (newLine.tag) {
+            // account tagged traffic in the untagged stats (for historical reasons?)
+            newLine.tag = 0;
+            lines->push_back(newLine);
+        }
         return Result<void>();
     };
     Result<void> res = statsMap.iterate(processDetailUidStats);
@@ -236,21 +242,20 @@
     std::sort(lines->begin(), lines->end());
 
     // Similar to std::unique(), but aggregates the duplicates rather than discarding them.
-    size_t nextOutput = 0;
+    size_t currentOutput = 0;
     for (size_t i = 1; i < lines->size(); i++) {
-        if (lines->at(nextOutput) == lines->at(i)) {
-            lines->at(nextOutput) += lines->at(i);
+        // note that == operator only compares the 'key' portion: iface/uid/tag/set
+        if (lines->at(currentOutput) == lines->at(i)) {
+            // while += operator only affects the 'data' portion: {rx,tx}{Bytes,Packets}
+            lines->at(currentOutput) += lines->at(i);
         } else {
-            nextOutput++;
-            if (nextOutput != i) {
-                lines->at(nextOutput) = lines->at(i);
-            }
+            // okay, we're done aggregating the current line, move to the next one
+            lines->at(++currentOutput) = lines->at(i);
         }
     }
 
-    if (lines->size() != nextOutput + 1) {
-        lines->resize(nextOutput + 1);
-    }
+    // possibly shrink the vector - currentOutput is the last line with valid data
+    lines->resize(currentOutput + 1);
 }
 
 // True if lhs equals to rhs, only compare iface, uid, tag and set.
diff --git a/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp b/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp
index bf42b62..f8d9ec8 100644
--- a/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp
+++ b/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp
@@ -291,7 +291,7 @@
     populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
     std::vector<stats_line> lines;
     ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, mFakeStatsMap, mFakeIfaceIndexNameMap));
-    ASSERT_EQ((unsigned long)4, lines.size());
+    ASSERT_EQ((unsigned long)7, lines.size());
 }
 
 TEST_F(BpfNetworkStatsHelperTest, TestGetStatsWithSkippedIface) {
@@ -409,12 +409,18 @@
             .txPackets = TEST_PACKET0,
             .txBytes = TEST_BYTES0,
     };
-    StatsValue value3 = {
+    StatsValue value3 = {  // value1 *2
             .rxPackets = TEST_PACKET0 * 2,
             .rxBytes = TEST_BYTES0 * 2,
             .txPackets = TEST_PACKET1 * 2,
             .txBytes = TEST_BYTES1 * 2,
     };
+    StatsValue value5 = {  // value2 + value3
+            .rxPackets = TEST_PACKET1 + TEST_PACKET0 * 2,
+            .rxBytes = TEST_BYTES1 + TEST_BYTES0 * 2,
+            .txPackets = TEST_PACKET0 + TEST_PACKET1 * 2,
+            .txBytes = TEST_BYTES0 + TEST_BYTES1 * 2,
+    };
 
     std::vector<stats_line> lines;
 
@@ -426,8 +432,9 @@
     // Test 1 line stats.
     populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
     ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, mFakeStatsMap, mFakeIfaceIndexNameMap));
-    ASSERT_EQ((size_t) 1, lines.size());
-    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[0]);
+    ASSERT_EQ((size_t) 2, lines.size());  // TEST_TAG != 0 -> 1 entry becomes 2 lines
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0, lines[0]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[1]);
     lines.clear();
 
     // These items should not be grouped.
@@ -437,7 +444,7 @@
                       mFakeStatsMap);
     populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
     ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, mFakeStatsMap, mFakeIfaceIndexNameMap));
-    ASSERT_EQ((size_t) 5, lines.size());
+    ASSERT_EQ((size_t) 9, lines.size());
     lines.clear();
 
     // These items should be grouped.
@@ -445,14 +452,18 @@
     populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX3, TEST_COUNTERSET0, value1, mFakeStatsMap);
 
     ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, mFakeStatsMap, mFakeIfaceIndexNameMap));
-    ASSERT_EQ((size_t) 5, lines.size());
+    ASSERT_EQ((size_t) 9, lines.size());
 
     // Verify Sorted & Grouped.
-    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[0]);
-    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET1, TEST_TAG, lines[1]);
-    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG + 1, lines[2]);
-    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID2, TEST_COUNTERSET0, TEST_TAG, lines[3]);
-    expectStatsLineEqual(value2, IFACE_NAME2, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[4]);
+    expectStatsLineEqual(value5, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0,            lines[0]);
+    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET1, 0,            lines[1]);
+    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG,     lines[2]);
+    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET1, TEST_TAG,     lines[3]);
+    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG + 1, lines[4]);
+    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID2, TEST_COUNTERSET0, 0,            lines[5]);
+    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID2, TEST_COUNTERSET0, TEST_TAG,     lines[6]);
+    expectStatsLineEqual(value2, IFACE_NAME2, TEST_UID1, TEST_COUNTERSET0, 0,            lines[7]);
+    expectStatsLineEqual(value2, IFACE_NAME2, TEST_UID1, TEST_COUNTERSET0, TEST_TAG,     lines[8]);
     lines.clear();
 
     // Perform test on IfaceStats.
@@ -485,39 +496,48 @@
             .txPackets = TEST_PACKET1,
             .txBytes = TEST_BYTES1,
     };
+    StatsValue value4 = {  // value1 * 4
+            .rxPackets = TEST_PACKET0 * 4,
+            .rxBytes = TEST_BYTES0 * 4,
+            .txPackets = TEST_PACKET1 * 4,
+            .txBytes = TEST_BYTES1 * 4,
+    };
 
     // Mutate uid, 0 < TEST_UID1 < INT_MAX < INT_MIN < UINT_MAX.
-    populateFakeStats(0, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
-    populateFakeStats(UINT_MAX, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
-    populateFakeStats(INT_MIN, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
-    populateFakeStats(INT_MAX, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(0,         TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(UINT_MAX,  TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(INT_MIN,   TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(INT_MAX,   TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
 
     // Mutate tag, 0 < TEST_TAG < INT_MAX < INT_MIN < UINT_MAX.
-    populateFakeStats(TEST_UID1, INT_MAX, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
-    populateFakeStats(TEST_UID1, INT_MIN, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
-    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, INT_MAX,  IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, INT_MIN,  IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0,        IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
     populateFakeStats(TEST_UID1, UINT_MAX, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
 
     // TODO: Mutate counterSet and enlarge TEST_MAP_SIZE if overflow on counterSet is possible.
 
     std::vector<stats_line> lines;
     ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, mFakeStatsMap, mFakeIfaceIndexNameMap));
-    ASSERT_EQ((size_t) 8, lines.size());
+    ASSERT_EQ((size_t) 12, lines.size());
 
     // Uid 0 first
-    expectStatsLineEqual(value1, IFACE_NAME1, 0, TEST_COUNTERSET0, TEST_TAG, lines[0]);
+    expectStatsLineEqual(value1, IFACE_NAME1, 0,         TEST_COUNTERSET0, 0,        lines[0]);
+    expectStatsLineEqual(value1, IFACE_NAME1, 0,         TEST_COUNTERSET0, TEST_TAG, lines[1]);
 
     // Test uid, mutate tag.
-    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0, lines[1]);
-    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MAX, lines[2]);
-    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MIN, lines[3]);
-    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, UINT_MAX, lines[4]);
+    expectStatsLineEqual(value4, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0,        lines[2]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MAX,  lines[3]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MIN,  lines[4]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, UINT_MAX, lines[5]);
 
     // Mutate uid.
-    expectStatsLineEqual(value1, IFACE_NAME1, INT_MAX, TEST_COUNTERSET0, TEST_TAG, lines[5]);
-    expectStatsLineEqual(value1, IFACE_NAME1, INT_MIN, TEST_COUNTERSET0, TEST_TAG, lines[6]);
-    expectStatsLineEqual(value1, IFACE_NAME1, UINT_MAX, TEST_COUNTERSET0, TEST_TAG, lines[7]);
-    lines.clear();
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MAX,   TEST_COUNTERSET0, 0,        lines[6]);
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MAX,   TEST_COUNTERSET0, TEST_TAG, lines[7]);
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MIN,   TEST_COUNTERSET0, 0,        lines[8]);
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MIN,   TEST_COUNTERSET0, TEST_TAG, lines[9]);
+    expectStatsLineEqual(value1, IFACE_NAME1, UINT_MAX,  TEST_COUNTERSET0, 0,        lines[10]);
+    expectStatsLineEqual(value1, IFACE_NAME1, UINT_MAX,  TEST_COUNTERSET0, TEST_TAG, lines[11]);
 }
 }  // namespace bpf
 }  // namespace android