Does anyone else experience disappearing unread posts? Example from tonight: I clicked "Show unread posts since last visit" and it gave me six threads (because, previously, the other 15-or-so disappeared). I selected one, came back to "unread", and there were two remaining, which does not work out, mathematically. Other times it's happened with over a page of unread posts.
Occasionally when this happens, if I've been very active on the forum, it'll show no unread posts, but then it'll show, say, five under "Show new replies to your posts."
No, I am not accidentally clicking "mark all as read" or forgetting if I've intentionally click that.