Hey folks. I see this happen every once in a while on the site here. A whole string of questions that were asked ages ago suddenly get bumped to the top of the list by the site's coding, burying recent questions that are still active.
My request? If you're one of the people who asked a question that just reappeared, go in and select an "answer" if a good one was provided, or close the question if you no longer care. Naturally, leave it alone if you're still waiting for one (maybe edit the question itself with an update).
Let's keep this site productive and relevant!
UPDATE: Well, we seem to be getting nowhere with people policing their own posts. Won't you join me in voting to close those posts that get automatically cycled back to the top? We need 5 votes to actually close a question. You can find the "close" link directly beneath the subject tags.