We have two different issues there:
First, there appears to be a problem with the stats for yesterday, ie a lot of negative figures showing for a couple of affiliates.
The cause of the error has now been identified.
The compensating correcting adjustments will appear in tomorrows run (todays figures will be unchanged but taking the 2 days together will cancel out the error)
Secondly, our stats normally show negative figures when some fraud/charge back players appear: the player account is eliminated and negative figures appears on your stats.
I hope this helps,