I just lose my hog !!

So I just lost my Mechano-Hog I put it in the neutral AH for 20 gold relogged and logged into my 2nd account within 10 seconds. I didn't get the 20 sec log-out timer, dunno how that works cos sometimes you get that and sometimes you don't. I wanted the hog on my ally account. I got a major shock cos when I looked for the hog it has already been sold. I mean really? Within 10 seconds? The guy who bought it says that he already resold it. I dunno if it's the truth or not but he was generous enough to give me 15k gold for my lose. He told me about the methode that he uses to get items to his ally toon from his horde. He logs 2 clients, have them ready to purchase it and then logs of. I got 2 questions.

1. Is that allowed? Cos my ally toon is on another acc so I could do that too.
2. Is there any chance that I can get a rollback? just 30 min will do. Thanks.
3. Option 2 is ofc not possible but since I lost all my gold in making it and then losing it for 20 gold, it there anything that I can do to get the hog back? HOG goes for like 350k-400k in AH in MoP so you can guess that I'm pretty pissed off!

Lemme know your thoughts