I think a lot of threads have been deleted, and your posts would go with them if they are in those threads. It's probably not personal, just part of a board cleanup.
That could probably be the case. However its normally at least a week after the post (as in my campiagn has already paid for that post and then it gets deleted, meaning the campaign isn't really getting as much of an advert it wishes (it is probably an OP locking and deleting a thread though once the answer has been found to their issue - or a moderator).