I've posted 4 auctions in the last ten minutes, 3 of which have disappeared.
The missing 3 would have been my 6th, 7th and 8th item on the auction house. They were posted with various amounts and some had and didnt have buyouts.
yes, just now i put a rare 2 handed axe i found in the ah to see how it worked really. it was equiped to my barb when i put it in the AH and asked if i wished to proceed, i clicked yes and it created the Ah listing. after about only 2 minutes when i was looking at other items, i went to check if there were any bids and to my suprise the item was gone with no bids, and not in my stash or my barb.