Hand of the Week 7: Razz Edition

Here's a hand that happened to me recently in the HORSE games on stars. No one was short stacked enough to make going all-in a possibility:

3rd Street
seat 1 [Qd]
seat 2 [Kd]
seat 3 [9h]
seat 4 [5s]
seat 5 [3d]
seat 6 [6c]
seat 7 [Ah]
Me [7d 5c 9c]

The Kd brings it in. The 9h, 3d, 6c, and I call the bring-in.
Before we go any further, we can analyze what has happened so far. Since the bring-in was only flat called by all these players, the marginal holding of [7d5c9c] is not a bad call, because the multiway pot and the cheap price. Considering the fact that all the hands that flat called, they probably have weak hands similar to mine. With this knowledge, outplaying them would be simply done by watching their boards.

4th street

seat 2 [Kd Jd]
seat 3 [9h 7c]
seat 5 [3d Kc]
seat 6 [6c Qs]
Me [7d 5c] [9c Ts]

Action: Everone checks

Fairly standard so far. At this point, there a very good chance that my hand is good, considering seat 3's check. If he does have a hand that dominates mine there is no reason for him to check here. He has no need to fear any of the boards that contain paint. I check simply to be play it safe.

5th Street
seat 2 [Kd Jd 5d]
seat 3 [9h 7c Ks]
seat 5 [3d Kc 3s]
seat 6 [6c Qs 8s]
Me [7d 5c] [9c Ts Qc]

Seat 6 checks
I check
Seat 2 checks
Seat 3 bets
Seat 5 calls
Seat 6 folds
I raise
Seat 3 calls
Seat 5 calls

I plan on ripping 6th street for free, because everyone's board sucks. However the action that goes down changes my plans. Since the only hand [6 Q 8] I fear folds, I can now really punish these players who are playing with open threes and AT BEST a 9-7 draw. I am fairly sure I have the best hand here. The open threes calling me worries me, but no two hole cards could scare me.


6th Street
seat 3 [9h 7c Ks Qh]
seat 5 [3d Kc 3s 4h]
Me [7d 5c] [9c Ts Qc Ad]

Action
I bet
Seat 3 calls
Seat 5 raises
I 3-bet
Seat 3 flat calls
Seat 5 calls

I have the best hand and I'm betting and raising, the best that seat 3 is drawing for is a 9-7, the best that seat 5 could have is wheel draw. In my mind that couldn't be true, because he would've raised 3rd street instead of limping. And even if he does have A-2-3-4, then I still have the best hand, going into the last card. Why he raises, I have no idea.

7th street
seat 3 [9h 7c Ks Qh]
seat 5 [3d Kc 3s 4h]
Me [7d 5c] [9c Ts Qc Ad] [8d]

Action
I check
Seat 3 checks
Seat 5 bets
I call
Seat 3 calls

Seat 5 [Ac 2h 3d Kh 3s 4h Th] (Lo: T,4,3,2,A)

Me [7d 5c 9c Ts Qc Ad 8d] (Lo: 9,8,7,5,A)

Seat 3 [2d As 9h 7c Ks Qh 8h] (Lo: 9,8,7,2,A)

What happened:
I decide to play it safe and check-call the last street. Seat 5's aggression is perplexing, and I have absolutely no idea why he would be so aggressive into our boards, which clearly have him beat, but it's enough to get me to slow down, even though I improved on 7th street. Another perplexing thing is Seat 3's willingness to put so much money in on 5th street and 6th street, where 2 big bets and 3 big bets went in on a very very small pot, when he was clearly behind.

This hand buggered my mind. I still have no idea what to think of it. Perhaps I pushed small edges too far in this hand, but considering the circumstances it seemed like the right thing to do.

Thoughts?