Your card was charged only 26.05 and with the coupon discount only being 12.69 the other 12.00 was the instore credit used for this order.

And no worries on the accidental credit I applied to your credit card. It was our mistake for missing the 12.69 discount that was applied when researching this but everything was taken out as it should have been.

So in summary it looked like this

Total order was 50.74
   minus coupon discount  12.69
Makes the new total 38.05

payment was made of
instore credit applied 12.00
Credit card charge 26.05

Hope this helps explain in detail.

Thanks