trouble with sets

[mikelow]

40-80 at the Commerce. Two hands really troubled me.

Hand 1:
I'm on the button with 66. One limper in MP, cutoff bets, and I three-bet. SB folds, and BB calls. MP and cutoff also call. Flop is QJ6 rainbow. Checked to cutoff who bets, I raise and BB just calls. MP folds and cutoff calls.

Turn is a 5 putting a heart draw up. BB checks, MP checks and I bet. BB raises, cutoff folds, and I three-bet. BB four-bets and I call. River is an offsuit 6 and I call BB's bet. He shows QQ.

Hand 2:
Same game an hour later. I have black tens in the cutoff. UTG limps, a limper in MP, and I raise. SB folds, BB calls, and UTG and MP call. Flop is JT2 rainbow. Checked to UTG who bets. MP folds, BB folds and UTG calls.

Turn is an 8, completing the rainbow. UTG checks and calls my bet. River is a six, and UTG check-raises my bet. After a bit of thought, I three-bet. UTG four-bets!. I call and I'm shown Q9o.

Was my play standard? Or not?