There's a bug in auctions on the PTR. Whenever I outbid someone else's bid, it says that the highest bidder is still the other guy and the amount of silver I typed in is now HIS bid. Now that's just nonsense.
Example: I wanna outbid X's bid of 500 silver with 505 silver. I typed in 505, clicked bid, but what comes after that is the highest bidder is still X with the 505 silver that I just typed in.