Your betsizes are pretty bad in all of these.

Hand #1: If this is the kind of guy to be raising A8o from UTG then you can 3-bet TT preflop here. Calling's still fine though. On the flop raise larger since I assume you think you have the better hand here. A min-raise gives all the draws such a nice price to call. And bet the turn. If you don't think you have the best hand on the flop, you shouldn't be raising. As played, fold the river.

Edit: Forgot hand #2

Hand #2: Bet the flop harder. As played fold to the river bet.