An interesting note - all of my major swings have taken place at NL$50. That makes my stats rather interesting:

NL$10 (725 hands):
VP$IP: 26.34
Net: 5.93
BB/100: 4.09
PFR: 5.79

NL$25 (6312 hands):
VP$IP: 26.94
Net: 188.30
BB/100: 5.97
PFR: 4.93

NL$50 (4204 hands):
VP$IP: 22.74
Net: (396.04)
BB/100: (9.42)
PFR: 5.61

NL$100 (1615 hands):
VP$IP: 22.91
Net: 185.20
BB/100: 5.73
PFR: 5.33

Interestingly enough, this weekend I played both tighter and more aggressive (PFR =7% & VP$IP = 18%; increased my total aggro factor by .02), yet suffered worse results.