right pushes ITM?

first push was based on my stack size and high card strength having the ace. second was probably too much but, but honestly i just wanted to get my chips in right away given the size of blinds i'd pick up but i think this was incorrect. third, again i'm short stacked so i'm not sure what the proper play is here. is this hand good enough HU to push on the turn when i made my pair? just unfortunate it put a flush on board i guess.

***** Hand History for Game 3057387386 *****
NL Texas Hold'em $10 Buy-in + $1 Entry Fee Trny:17529532 Level:7 Blinds(150/300) - Friday, November 18, 21:44:49 EDT 2005
Table Table 67259 (Real Money)
Seat 3 is the button
Total number of players : 3
Seat 9: FarewellToKK ( $2608 )
Seat 10: heret1k ( $1270 )
Seat 3: clim33 ( $4122 )
Trny:17529532 Level:7
Blinds(150/300)
** Dealing down cards **
Dealt to heret1k [ As 4c ]
clim33 folds.
FarewellToKK raises [450].
heret1k is all-In [970]
clim33: good job all ........in the money
FarewellToKK calls [670].


***** Hand History for Game 3057397906 *****
NL Texas Hold'em $10 Buy-in + $1 Entry Fee Trny:17529532 Level:7 Blinds(150/300) - Friday, November 18, 21:46:40 EDT 2005
Table Table 67259 (Real Money)
Seat 10 is the button
Total number of players : 3
Seat 9: FarewellToKK ( $2888 )
Seat 10: heret1k ( $1590 )
Seat 3: clim33 ( $3522 )
Trny:17529532 Level:7
Blinds(150/300)
** Dealing down cards **
Dealt to heret1k [ Ah Ac ]
heret1k is all-In [1590]
clim33 folds.
FarewellToKK folds.
heret1k does not show cards.
heret1k wins 2040 chips
Game #3057398886 starts.

NL Texas Hold'em $10 Buy-in + $1 Entry Fee Trny:17529532 Level:8 Blinds(200/400) - Friday, November 18, 21:48:08 EDT 2005
Table Table 67259 (Real Money)
Seat 3 is the button
Total number of players : 2
Seat 10: heret1k ( $1640 )
Seat 3: clim33 ( $6360 )
Trny:17529532 Level:8
Blinds(200/400)
** Dealing down cards **
Dealt to heret1k [ Ks 8h ]
clim33 calls [200].
heret1k checks.
** Dealing Flop ** [ 5d, Ad, Qc ]
heret1k checks.
clim33 checks.
** Dealing Turn ** [ 8d ]
heret1k bets [1100].
clim33 raises [2200].
heret1k is all-In [140]