I'm so confused!

[fnurt]

Level 1 of a WCOOP satellite. No read on villain.

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (8 handed) internettexasholdem.com

BB (t1470)
Hero (t1750)
UTG+1 (t2170)
MP1 (t1450)
MP2 (t1360)
CO (t1460)
Button (t1160)
SB (t2680)

Preflop: Hero is UTG with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#CC3333">Hero raises to t60</font>, <font color="#666666">5 folds</font>, SB calls t50, <font color="#666666">1 fold</font>.

Flop: (t140) 4[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t90</font>, SB calls t90.

Turn: (t320) 8[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets t260</font>, Hero calls t260.

River: (t840) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets t1340</font>, Hero...


What the heck is going on here? Comments on all streets are welcome.