Initial merchant payout off by 10 error

Okay I'm probably yelling into the void with this one, but here goes...

Back in July I started receiving payouts from Garmin's merchant system; there are two payers in my case; "Garmin International Inc." and "Garmin (Europe) Limited". Everything has been making sense in subsequent months, but the initial payouts from these two payers were both missing exactly 10.00€ in comparison to the reported sales.

Accountants like things to add up exactly, and this doesn't add up in a rather mysterious way.

I've been pinging ConnectIQAppAdmin@ about it, but no responses.

Did anyone else experience a similar quirk? If so, any explanation?