Hand 1) You're pushing 5425 into a 825 pot? MP3 raised more then 1/4 of his stack, so I guess your push was an isolation move rather then trying to make him fold? I don't really like the move one way or the other. Don't you have much confidence in your postflop play? You have position on him, take advantage of it or get away cheap if you fear AK on the Kxx flop...

Hand 2) UTG is the big stack so he could also have been raising with any 2 trying to isolate a short stack and suckout on him or just steal the blinds. I think you're well ahead of his range and the push looks fine to me. If he had the A or flush that's tough luck, you can't do much about that.