Are you assuming random hole cards for your opponent? If so, then that's wrong... use
www.propokertools.com, it lets you intelligently assign hand ranges to your opponent.
I don't like 3rd at all.
You really think your 98 was winning on 6th? That seems unlikely and here's why
* the raw chance that your opponent has a pair if he started with a quality hand is about 50%
* however, look at his up cards - A 3 5
- you have and A and a 3
- Seat 3 shows and A and a 3
- an A and a 3 already folded. There are 12 cards of A35... there are only 3 unaccounted for...
conclusion: it's very unlikely that he paired.
So in order for you to be ahead, he needs to have a hidden pair, two cards 8 and above, or one card above 9, or one of the remaining three 5s. Now it's possible he'd try to isolate against the short stack with something like A89 or A2T but if he did that's pretty silly, really. There's almost nothing to gain from such a gamble, and he'd actually generally prefer that the guy gets knocked out rather than double up.
Oh and the HH is weird... did the T open complete or did he call a completion? Or are they both considered completes because the first one wasn't a full one?