Originally Posted by rowan

Do you have more than one account merged under your master? AFAIK it's either all or nothing, which means you either get X% gross, or X% net (after processing charges). If you have multiple accounts and they have different settings then your processing cut is probably going to vary a bit with each payout. There's no reliable way to tell what programs have it set to, unless you have very few sales and can figure it out by comparing stats with your payout information.