diff --git a/hwe/compare/fixtures/monthly_post_tail_order.json b/hwe/compare/fixtures/monthly_post_tail_order.json
new file mode 100644
index 00000000..042dc1c0
--- /dev/null
+++ b/hwe/compare/fixtures/monthly_post_tail_order.json
@@ -0,0 +1,128 @@
+{
+  "action": "PostUpdateMonthly",
+  "environment": {
+    "year": 193,
+    "month": 2,
+    "startyear": 193,
+    "seedYear": 193,
+    "seedMonth": 1
+  },
+  "setup": {
+    "world": {
+      "hiddenSeed": "monthly-post-tail-2"
+    },
+    "syncEnvironment": true,
+    "clearNeutralAuctions": true,
+    "resetCities": true,
+    "resetGenerals": true,
+    "deleteOtherGenerals": true,
+    "keepGeneralIds": [1, 2],
+    "resetNations": true,
+    "deleteOtherNations": true,
+    "keepNationIds": [1, 2],
+    "resetDiplomacy": true,
+    "gameEnvironment": {
+      "tournament": 0,
+      "tnmt_trig": true,
+      "tnmt_pattern": [0, 1, 2, 3],
+      "prev_winner": null
+    },
+    "general": [
+      {
+        "id": 1,
+        "values": {
+          "name": "갑장",
+          "nation": 1,
+          "city": 1,
+          "officer_level": 12,
+          "npc": 0,
+          "gold": 5000,
+          "rice": 7000,
+          "crew": 100,
+          "leadership": 50,
+          "strength": 40,
+          "intel": 30,
+          "experience": 100,
+          "dedication": 200
+        }
+      },
+      {
+        "id": 2,
+        "values": {
+          "name": "을장",
+          "nation": 2,
+          "city": 2,
+          "officer_level": 12,
+          "npc": 0,
+          "gold": 6000,
+          "rice": 8000,
+          "crew": 200,
+          "leadership": 60,
+          "strength": 50,
+          "intel": 40,
+          "experience": 300,
+          "dedication": 400
+        }
+      }
+    ],
+    "nation": [
+      {
+        "id": 1,
+        "values": {
+          "name": "갑국",
+          "capital": 1,
+          "gold": 10000,
+          "rice": 20000,
+          "tech": 100,
+          "level": 2,
+          "gennum": 1,
+          "power": 7
+        }
+      },
+      {
+        "id": 2,
+        "values": {
+          "name": "을국",
+          "capital": 2,
+          "gold": 2000,
+          "rice": 3000,
+          "tech": 50,
+          "level": 1,
+          "gennum": 1,
+          "power": 8
+        }
+      }
+    ],
+    "city": [
+      {
+        "id": 1,
+        "values": {
+          "name": "갑성",
+          "nation": 1,
+          "level": 4,
+          "supply": 1,
+          "front": 3,
+          "pop": 1000,
+          "pop_max": 2000
+        }
+      },
+      {
+        "id": 2,
+        "values": {
+          "name": "을성",
+          "nation": 2,
+          "level": 4,
+          "supply": 1,
+          "front": 3,
+          "pop": 2000,
+          "pop_max": 4000
+        }
+      }
+    ]
+  },
+  "observe": {
+    "generalIds": [1, 2],
+    "nationIds": [1, 2],
+    "cityIds": [1, 2]
+  }
+}
diff --git a/hwe/compare/monthly_event_trace.php b/hwe/compare/monthly_event_trace.php
index e206915e..5e14a401 100644
--- a/hwe/compare/monthly_event_trace.php
+++ b/hwe/compare/monthly_event_trace.php
@@ -364,6 +364,13 @@ function comparisonMonthlyEventTraceMain(): void
             DB::db()->delete('ng_auction', '`type` = %s AND finished = 0', 'uniqueItem');
             DB::db()->query('DELETE FROM storage WHERE namespace LIKE %s', 'ut\\_%');
         }
+        if (($setup['clearNeutralAuctions'] ?? false) === true) {
+            DB::db()->delete(
+                'ng_auction',
+                '`type` IN %ls AND host_general_id = 0',
+                ['buyRice', 'sellRice'],
+            );
+        }
         foreach (comparisonIntegerList($setup['clearNationTurnIds'] ?? [], 'clearNationTurnIds') as $nationId) {
             DB::db()->delete('nation_turn', 'nation_id = %i', $nationId);
         }
@@ -525,7 +532,16 @@ function comparisonMonthlyEventTraceMain(): void
             }
             UniqueConst::$hiddenSeed = $worldPatch['hiddenSeed'];
         }
-        foreach (['isunited', 'refreshLimit', 'block_change_scout', 'lastNPCTroopLeaderID'] as $key) {
+        foreach ([
+            'isunited',
+            'refreshLimit',
+            'block_change_scout',
+            'lastNPCTroopLeaderID',
+            'tournament',
+            'tnmt_trig',
+            'tnmt_pattern',
+            'prev_winner',
+        ] as $key) {
             if (array_key_exists($key, $gameEnvironmentPatch)) {
                 $gameStorage->setValue($key, $gameEnvironmentPatch[$key]);
             }
@@ -544,6 +560,8 @@ function comparisonMonthlyEventTraceMain(): void
             (int)($db->queryFirstField('SELECT COALESCE(MAX(nation), 0) FROM nation') ?? 0);
         $eventIdBeforeAction =
             (int)($db->queryFirstField('SELECT COALESCE(MAX(id), 0) FROM event') ?? 0);
+        $auctionIdBeforeAction =
+            (int)($db->queryFirstField('SELECT COALESCE(MAX(id), 0) FROM ng_auction') ?? 0);
         $snapshotRequest = ['observe' => $request['observe'] ?? []];
         $snapshotRequest['observe']['logAfterId'] =
             (int)($db->queryFirstField('SELECT COALESCE(MAX(id), 0) FROM general_record') ?? 0);
@@ -817,6 +835,30 @@ function comparisonMonthlyEventTraceMain(): void
                 'develcost',
             ]);
         }
+        if ($actionName === 'PostUpdateMonthly') {
+            $response['gameEnvironment'] = KVStorage::getStorage(DB::db(), 'game_env')->getValues([
+                'tournament',
+                'tnmt_trig',
+                'tnmt_pattern',
+                'tnmt_type',
+                'tnmt_auto',
+                'phase',
+            ]);
+            $response['createdNeutralAuctions'] = array_map(
+                static fn(array $row): array => [
+                    'id' => (int)$row['id'],
+                    'type' => $row['type'],
+                    'target' => $row['target'],
+                    'detail' => Json::decode($row['detail']),
+                ],
+                iterator_to_array(
+                    $db->query(
+                        'SELECT id, `type`, target, detail FROM ng_auction WHERE id > %i AND host_general_id = 0 ORDER BY id',
+                        $auctionIdBeforeAction,
+                    ),
+                ),
+            );
+        }
         if (in_array($actionName, ['OpenNationBetting', 'FinishNationBetting'], true)) {
             $bettingStorage = KVStorage::getStorage(DB::db(), 'betting');
             $response['betting'] = $bettingStorage->getAll();