I was replying to a post on page 12 of the 13 page Star Trek Into Darkness thread this morning. About 20 seconds in I started getting notice of a new post having been made. After refreshing the page after responding, no new posts.
Happening right now too. I'm posting from page 3 of a 4 page thread, don't kow if notice is legit until I post.
Edit - there were no new posts, it's a bug.