I too felt that there was an anomaly in the 1% fee being charged.  A review of my payout minutes revealed the following over a random 12 hour period:

Minute 43,44,46,44,47,47,44,47,48,49, 50 and 50   Total minutes 60 X 12 = 720 minutes X 1% = 7.2 minutes.

After doing the math it seems close enough.  Not nearly as wrong as I first thought.