diff --git a/boards/models.py b/boards/models.py
--- a/boards/models.py
+++ b/boards/models.py
@@ -168,11 +168,11 @@ class Tag(models.Model):
         return self.get_post_count() == 0
 
     def get_post_count(self):
-        posts_with_tag = Post.objects.filter(tag=self)
+        posts_with_tag = Post.objects.get_threads(tag=self)
         return posts_with_tag.count()
 
     def get_popularity(self):
-        posts_with_tag = Post.objects.filter(tag=self)
+        posts_with_tag = Post.objects.get_threads(tag=self)
         reply_count = 0
         for post in posts_with_tag:
             reply_count += post.get_reply_count()