Overplaying/Underplaying Overpairs

[poboys]

In reviewing my play in PokerTracker, I feel like I've been playing my 99-JJ hands poorly--especially when the flop is unders and the turn brings an over. Either I play too hard when behind or miss bets by letting chasers off the hook.

Here's an example hand:

Villian is 12/5.5 over 144 hands (not all of them from this session). Rated as a $-bag.

Hero is 10/5 at this table (say 60ish hands) and is down about 1/2 a buy-in.

Anyone play this hand any differently (esp interested in turn suggestions)?

Party Poker 3/6 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is UTG+2 with T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img]. CO posts a blind of $3.
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, CO (poster) calls, Button calls, <font color="#666666">2 folds</font>, UTG+1 calls.

Flop: (9.33 SB) 3[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, CO calls, Button folds, <font color="#CC3333">UTG+1 raises</font>, <font color="#CC3333">Hero 3-bets</font>, CO folds, UTG+1 calls.

Turn: (8.16 BB) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+1 checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">UTG+1 raises</font>, Hero calls.

River: (12.16 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG+1 bets</font>, Hero calls.

Final Pot: 14.16 BB
<font color="#009B00">Main Pot: 14.16 BB, between UTG+1 and Hero.</font>