POsts have been deleted. That stat only shows posts that still exist.Hummm... you can use the last post number (the post id) to update the stats instead to do sum all posts.
The forum auto recounts all statistics every week or so, just to make sure they're not off.
This however is from the forum stats not counting posts that have been removed.
But I prefer the post count showing all post that exists like is now... so we will reach the 200k yet... the post id only shows the incremental id.