Do i make a wrong guess?

I played 3/6 in a cardroom yesterday.. and i had a hand that broke me..but i m wondering if i make any wrong move.

Preflop (12 SB): Hero UTH K [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/heart.gif[/img] raise 4 callers and both blinds call 6 players in the plot

Flop ( 6 SB) : 9 [img]/images/graemlins/spade.gif[/img] 5 [img]/images/graemlins/diamond.gif[/img] 2 [img]/images/graemlins/club.gif[/img]
Hero bet: nobody fold.

Turn 10 (8 BB)10 [img]/images/graemlins/heart.gif[/img] hero bets 2 callers mp3 2 bets.. 2 blinds fold Hero calls and the callers call

river (10 BB) K [img]/images/graemlins/spade.gif[/img] Raiser bets hero raises 2 callers fold raiser 3 bets..

There is several hands in my mind
1)99
He tries to slow play his set on the flop and 2 bets me on the turn. and doesn't know i outdraw him on the river...so he 3 bets me on the river
2)9 10
He 2 bets me on the turn, and he thinks his two pairs is good...
3)J Q..
the only hand that i worry...but why does he 2 bets me on the turn? He sure does have enough pot odd to raise for open end straight on the turn for value..but runner-runner?

Hero is short-stacked..so he is going to go in all in with his remaining 3 bets anyway

The results is obvious as hero went broke...but did i make any wrong decision?

any suggestions are welcome