How badly did I misplay? (2 hands)

[testaaja]

Hand 1.
I really thought button had 2 pair on the flop after the cap. After the turn check should I have raised the river? Or bet it instead? This calling was the worst I think.
PokerStars 0.25/0.50 Hold'em (10 handed) FTR converter on zerodivide.cx

Preflop: Hero is CO with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, UTG+2 calls, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">2 folds</font>, UTG+2 folds.

Flop: (6.40 SB) K[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">Button raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">Button caps</font>, Hero calls.

Turn: (7.20 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

River: (7.20 BB) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, Hero calls.

Final Pot: 9.20 BB

Hand 2.
Oh man I SPEWED! I need serious help with this one. I mean what could CO have if he knew I held a 4? Or am I giving too much gredit for him? I was worried about a straight on the turn but.. raising is fun! I don't really know what to do here. I need help! Thanks [img]/images/graemlins/smile.gif[/img]
PokerStars 0.25/0.50 Hold'em (6 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with Q[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/diamond.gif[/img].
UTG calls, MP calls, CO calls, Button calls, SB completes, Hero checks.

Flop: (6 SB) 4[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, UTG calls, MP folds, CO calls, Button calls, SB folds.

Turn: (5 BB) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">Hero bets</font>, UTG folds, <font color="#CC3333">CO raises</font>, Button calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">CO caps</font>, Button calls, Hero calls.

River: (17 BB) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, Button calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">CO caps</font>, Button calls, Hero calls.

Final Pot: 29 BB