We recently switched to the Raiser's Edge NXT Online Giving form, and are giving donors the option to cover the credit card fees. For one $500 donation, the donor chose to cover the fees and paid $518.45, but the fees were only $15.80. We ended up netting $502.65 instead of the $500 we should have netted. Has anyone had this happen where a donor is actually overcharged for the fees?