2 more hands i'm not sure if I played right

[benneh]

I think one of my biggest leaks (probably my biggest) is overplaying my overcards when they whiff, but I can never tell what the line is. This first hand is an example.

Reads-

UTG+2 and MP1 are extremely passive and pretty loose (40+ vpip over 50 for both)
and i have an insignificant amount of hands on CO


Party Poker 0.50/1 Hold'em (10 handed) converter

Preflop: Hero is SB with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, MP1 calls, <font color="#666666">2 folds</font>, CO calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, UTG+2 calls, MP1 calls, CO calls.

Flop: (9 SB) 3[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, UTG+2 folds, MP1 calls, CO calls.

Turn: (6 BB) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP1 checks, <font color="#CC3333">CO bets</font>, <font color="#CC3333">Hero raises</font>, MP1 calls, CO calls.

River: (12 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, MP1 checks, CO checks.

Final Pot: 12 BB

Hand 2:

Button is an unknown as I just sat down and this is my 2nd hand.

A [img]/images/graemlins/heart.gif[/img]9 [img]/images/graemlins/heart.gif[/img] in BB

Fold around to button who open raises. I flat call (3 bet in order here, or is that read dependent?) suspecting it was a steal raise, but not wanting to take chances at a new table quite yet.

flop is 9 4 4 rainbow

I checkraise the button and get 3 bet.

I feel like i'm against an overpair, but call down as the turn and river come down 7 and then ten (making a backdoor flush)