just a couple of general points to consider.
1. I found that it was a waste of time trying to bluff at 2NL some idiot will always be calling with bottom pair and very often it would go multiway to the river.

2. on stars you can auto top off your stack so that when hands like your hand 3 come along you make as much money as possible. By not topping off you lost .68 or half of the stack you actually played in lost profit.
in the lobby click on options, tick the auto rebuy at NL,PL etc box , tick the "if i fall under 100 big blinds box" and tick the "my initial buy in amount box.
you will have to keep a mental check on how much you are spewing though else you could soon blow your roll if you are calling and folding/losing a lot which may be indicated by your low stacks in the examples you gave.