5050 recap again

Played very solid most of the tourney. One big mistake I made was when I 3bet a middle position raiser from the button with AQ. I was about 35bbs deep. He tanked and called. Flop came KT7. With a gut shot draw I could check behind and see what happens on the turn. However, I would rather take the pot down right now. He checks and I lead out for 1/2 pot. He calls and T comes on the turn. check, check. 7 on the river makes two pair. The pot is at 105k and I have about 60k left. He bets 21k into me.

Can he be betting 2 pair A high here? and can I fold?

Got down to 27 people and my table was very aggressive. I went card dead and couldn't find any good spots. Got down to 18 players and I was short stack with around 8bbs. I'm sure my image at this point was very tight weak. Both tables were very active and 6 more went out. I was down to 5 big blinds when I was in the big blind and was moving in with any 2 when I found A4 and doubled up. Two hands later I doubled up again with ak vs aq. I am now in 7 place out of 11 players left and have around 22 BBs. Two hands later I have AQ utg and raise, very active aggressive player in the bb reraises to 70k. This is the player that just doubled me up with AQ. I put him on a wide range here and think he may be raising thinking that I just got the chips and wouldn't want to play a big pot. I can't find the fold button and push all in 120k more which is about 1/3 of his stack and he calls with 66. I don't improve and am out.

Once again I am unsure if I made the right play here. I could have gotten away and still had 19 big blinds. I try not to let the prize money affect my decisions. In a sng or smaller tourney I make this move in a heartbeat but here I am playing for 11k and can't help wondering what if...