Can't fold the river - a leak? (1/2 Commerce)

[Ryno]

I don't bet/raise-fold too much on the river, perhaps it is a leak. What about these hands -

4-handed mustmove. I raise Jd5d on the button, BB calls. He is basically unknown. Flop is AKx with 1 diamond (the "x" was the diamond), he check-calls. Turn is Kd, check-check. River is 4d, he bets, I raise, he 3-bets, I call.

Second hand, full game, vs. Larry (kinda passive but untiltable likely-marginal-winner). I raise AKo in EMP, he coldcalls button, HU. Flop A33, bet-call. Turn 9, bet-call. River 5. Bet-raise...I call.