When you put something up it disappears into auction land.
There is an auction house tab for completed auctions. Auctions that you win drop the item there and you select there to send it to the stash. Gold from auctions you win also must be selected to send to stash. The same also goes for refunds for auctions lost and refunds on material costs when there is a difference in your benefit.
Do you notice a change in ur gold amount? The (dis)appearance of an item in your inventory? Or do you get a prompt letting you know about it.
There is an auction house tab for completed auctions. Auctions that you win drop the item there and you select there to send it to the stash. Gold from auctions you win also must be selected to send to stash. The same also goes for refunds for auctions lost and refunds on material costs when there is a difference in your benefit.
Check the source if you need to know more.
http://us.battle.net/d3/en/services/auction-house/how-to