K-Qs calling Ace high flop

[Thundercat32]

PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP1 (t2610)
MP2 (t2755)
CO :#A500AF(Villian 1)/ (t3720)
Button (t1640)
Hero (t3925)
BB :#A500AF(Villian 2)/ (t8480)
UTG (t7371)
UTG+1 (t8430)

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, CO :#A500AF(Villian 1)/ calls t200, <font color="#666666">1 fold</font>, Hero completes, BB :#A500AF(Villian 2)/ checks.

Flop: (t600) 9[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
Hero checks, Villian 2 checks, <font color="#CC3333">Villian 1 bets t800</font>, Hero calls t800, Villian 2 folds.

* It took me a good minute to make this call... once I thought about Villian 1 limping preflop the possibility of him just having a SC or Small PP really entered my mind and I figured I might still have the best hand.

Turn: (t2200) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Villian 1 checks.

* on the turn he checks behind me which makes me think maybe I did bust him with his hand in the cookie jar trying to steal

River: (t2200) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t1400</font>, Villian 1 calls t1400.

Final Pot: t5000

On the river I decided to make a bet (I guess this is referred to as a blocking bet) that's what I was hoping for, that they couldn't call because I figured it was the only way I win the pot.

Was this overthinking or just didn't work against my opponent?