Heads-up ...losing faith in my play

[minwoo]

I'm going through a spell where everytime it gets HU in a SNG...I ALWAYS take second. I just need assurance from you guys that I'm making the correct moves.

How do thsse look:
(All of these are $55 SNG so 10k chips in play)

1. Blinds 200/400
I'm in SB w/ KJo, 6200 chips ...I push

2. Blinds 250/500
I'm in SB w/ 22, 3400 chips....I push

3. Blinds 300/600
I'm in BB w/ A2o, 7000 chips...opponents pushes and I CALL.

4. Blinds 250/500
I'm in SB w/ 9Qo, 1900 chips...I push

5. Blinds 250/500
I'm in SB w/ 5Ts, 8900 chips...I push

Any other input w/ HU play in general would be appreciated.

Thanks guys.