transition to 2-4nl 20k hand stat checkup

[MyPTBB100isPOOP]

So i have played about 20k hands at 2-4 since moving up and am very unsatisfied with the results....looking for some feedback.

Total hands: 18,148
Lost: -1,417
VPIP: 21.3
VP$SB: 21.625
Folded SB to steal: 88.18
Folded BB to steal: 81.44
Att. to steal blinds: 35.45
Won $ wsf: 41.39
Went to sd %: 21.45
Won $ at showdown: 48.52
PFR%: 18.46
Agression factors
PF: 5.36
Flop: 5.83
Turn: 3.1
River: 3.03
Total: 4.5

I did really well at 1-2 and maintained over 5bb/100 for the last 40k hands, what can you all see that may be an issue, and what can you suggest?