Ok, so I had PP on 2 tables simultaneously, flopped sets on both, than got paid somewhat disappointingly. Too strong?

PS No-Limit Hold'em, $0.02 BB (6 handed) -

SB ($0.60)
BB ($0.81)
UTG ($5.31)
MP ($4.48)
CO ($6.36)
Hero (Button) ($3.66)

Preflop: Hero is Button with 4d4h,
MP calls $0.02, 1 fold, Hero bets $0.04, 1 fold, BB calls $0.02, MP calls $0.02

Flop: ($0.13) 8h, Jc, 4c
BB checks, MP checks, Hero bets $0.04, BB calls $0.04, MP calls $0.04

Turn: ($0.25) 8c
BB checks, MP checks, Hero bets $0.56, 2 folds

Total pot: $0.25 | Rake: $0


PS No-Limit Hold'em, $0.02 BB (5 handed) -

SB ($5.50)
BB ($1)
UTG ($1.51)
MP ($3.85)
Hero (Button) ($4.21)

Preflop: Hero is Button with 9h9s
UTG calls $0.02, 1 fold, Hero bets $0.04, SB calls $0.03, BB calls $0.02, UTG calls $0.02

Flop: ($0.16) 9d, 4c, 8c
SB checks, BB checks, UTG bets $0.04, Hero raises to $0.12, 2 folds, UTG calls $0.08

Turn: ($0.40) 6h
UTG checks, Hero bets $1.38, 1 fold

Total pot: $0.40 | Rake: $0

In the 1st case I figured I was getting called by any 8 or J. In the 2nd hand I wanted to avoid another draw for straight-chasers. Should I have played slower?

Also, if anyone can tell me the acronym Renton hates without actually using it I'd appreciate it!