EDIT: After receiving a response from the Devs, I changed the title. Original title was:
Stop Selling Item on the Auction House! Seller Beware!
There is a some sort of bug that is not returning some of your items if they go expired. Also, if you cancel said auction, you may get a message saying 'Uh-oh, we cant find your auction. error'. Thirdly, if someone does buy your auction, then the buyer may get the same message and your auction disappears along with your item.
Some of you may recognize me as the guy who typically has 700-800 auctions up at any given time. If you take a look now, I only have 248 auctions going.
Today, for the past 9 hours, I have not gotten 1 item back until about 5 minutes ago.
Please post similar experiences here. I have already submitted a bug report 4 days ago, but have not heard back.