Both banks were weirdly bad at details, but all parties actually involved ended up happy with the resulting transactions at least.
In our case, the bank claims to have paid the full amount on our behalf but on our side it looks like they forgot to adjust for the extra part-monthly fee, leaving us with some extra money, while for the seller, the situation might be significantly worse.
In either case, money is fake anyway, and probably this will all be sorted out Somehow(tm).