just my .02

hand 1...fine, not much else to do.

hand 2...pf-RR to $9ish and hammer the non-A flop.

hand 3...calling is fine (i guess) w/ only T-high and a paired board. especially when the villain doesnt respect your raise and bets into you again. may even fold here with a better read?

hand 4...may be A4/A5, but how can you tell? may be 45 or another random 2 pair, may be nothing...if i have the SB and i get the Ax and folded to, i bust a raise on you here...may not even be an A you are up against here, but still, i call here w/ no read, but i agree i prolly lose the hand to 2 pair. i personally cbet psb on the flop here, though, and that may take care of the A4.

again, just my .02