Facebook Audience Network miscalculating money

Hello guys,
are you observing some money lost from the earnings of September on FAN? I’ve noticed that they have deleted the equivalent of 1.5 days of earnings… by deleting them slowly day by day from some past earnings. Even thought they declared that there is problem from 18 to 21 September with the stats, it seems too strange to just cancel all that money. Anyone else noticed?

In the initial PDF mailed to me around 15 September, it said my earnings of August are 180$.
In the PDF of my payment received around 21, the analysis said total revenue 155$.
Something is weird.