diff --git a/boards/abstracts/settingsmanager.py b/boards/abstracts/settingsmanager.py
--- a/boards/abstracts/settingsmanager.py
+++ b/boards/abstracts/settingsmanager.py
@@ -180,7 +180,7 @@ class SettingsManager:
 
     def get_last_posts(self):
         post_ids = self.get_setting(SETTING_LAST_POSTS) or []
-        return list(boards.models.Post.objects.filter(id__in=post_ids))
+        return list(boards.models.Post.objects.filter(id__in=post_ids).order_by('thread__id'))
 
 
 class SessionSettingsManager(SettingsManager):