I keep getting "Late Answers" on my review tab on answers that are a year or older, and even on already closed questions. So I edit - and the closed question comes right back at the top again. That can't be right - can it?
It's just catching older and older posts in the queue; the initial oldest post date it would grab was intentionally conservative so Stack Overflow wouldn't be insanely swamped with posts: they look farther in the past every month and will eventually cover all posts. Just another weird thing we have to put up with to accommodate SO's scale on the same engine.
Not sure what you mean about the question coming back to the top again though. Posts you've reviewed should be removed from your queue.