A few $2NL hands I was unsure if played correctly?

Full Tilt No-Limit Hold'em, $0.02 BB (9 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

Hero (BB) ($2.08)
UTG ($0.69)
UTG+1 ($0.84)
MP1 ($0.43)
MP2 ($1.49)
MP3 ($1.73)
CO ($0.97)
Button ($0.96)
SB ($0.38)

Preflop: Hero is BB with A, 5
3 folds, MP2 calls $0.02, 1 fold, CO checks, Button calls $0.02, 1 fold, Hero checks

Flop: ($0.09) 3, 5, 2 (4 players)
Hero bets $0.08, MP2 calls $0.08, 2 folds

Turn: ($0.25) 9 (2 players)
Hero checks, MP2 bets $0.12, Hero calls $0.12

River: ($0.49) 10 (2 players)
Hero checks, MP2 checks

Total pot: $0.49 | Rake: $0.03

Looking back on this hand I feel I basically told him my hand.

Full Tilt No-Limit Hold'em, $0.02 BB (7 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

Hero (SB) ($1.81)
BB ($0.66)
UTG ($0.69)
MP1 ($0.33)
MP2 ($0.91)
CO ($1.73)
Button ($2.43)

Preflop: Hero is SB with 7, A
3 folds, CO calls $0.02, Button bets $0.04, Hero calls $0.03, 1 fold, CO calls $0.02

Flop: ($0.14) 8, 5, 3 (3 players)
Hero checks, CO checks, Button checks

Turn: ($0.14) J (3 players)
Hero checks, CO bets $0.10, Button calls $0.10, Hero raises to $0.32, CO calls $0.22, 1 fold

River: ($0.88) 8 (2 players)
Hero bets $0.50, 1 fold

Total pot: $0.88 | Rake: $0.05

Here I wasn't sure on two barrel?

Full Tilt No-Limit Hold'em, $0.02 BB (8 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

Hero (UTG+1) ($2.28)
MP1 ($0.61)
MP2 ($0.65)
CO ($0.27)
Button ($0.94)
SB ($1.44)
BB ($2.29)
UTG ($2.03)

Preflop: Hero is UTG+1 with J, J
1 fold, Hero bets $0.08, MP1 calls $0.08, 5 folds

Flop: ($0.19) 8, K, 3 (2 players)
Hero bets $0.14, MP1 calls $0.14

Turn: ($0.47) 7 (2 players)
Hero bets $0.39