According to the post fight interview, Mir says it was an ugly win and it wont happen again. I think he's well aware of what he needs to do to be back on that higher level.
He said he took his training for granted and didnt diet well for that fight.
As for Tim, I dont think it was a fluke. A win's a win. Especially one where someone snaps your arm. Something thats not too commonplace. I think Tim was just down talking that fight and since he's defeated AA twice he's just being cocky now. Before he beat AA the first time, Im sure if you had asked Tim about the Mir fight, he most likely say that he got caught and just couldnt shake Mir, but now its just him being cocky because he beat AA twice and Mir has put on two horrbile exhibitions. I give Mir two more fights before I'd say he's out of the game.