Akura, that automatic message you get after submitting is misleading. I've entered many challenges and contests, and never once got any e-mail message confirming my entry. (Though I did get an IM once, from the nice folk who ran the Ultimate Fire contest.) Most of the time, you don't hear anything. It's a good idea to upload your entry early (as you did), so you can check to see if it appears. If you don't see it on the contest page within a couple of days, just re-submit it. Upload glitches are very common, unfortunately.