Lol the demands from this guy never end even after agreeing to refund him, I'm not going to call your bank and cancel your pending payment, thats up to you. I don't even think I could stop it even if I wanted to, and I looked for an option on dwolla but I don't see one. If they have that option let me know exactly where to go, otherwise you need to call your bank.
As for the request to receive a refund in dwolla instead of BTC, that is fine by me.
agreeing to refund someone and ACTUALLY refunding them are two completely different things.
in all honesty, if you could have refunded his BitCoins as BitCoins, its so simple to do so and has plenty of community verification via Block Explorer, I don't see why you wouldn't have just for the sake taking the high ground.
Instead it became a public show. I understand why Leon choose to come public after haploid brought this to the public eye, you didn't want to give any impression that you were scamming him. Not coming public would have put a more negative light on you. However, both of your attitudes overall in this whole mess harm BOTH of your reputations in the long wrong.