I went into: admin panel/ localization / currencies

I selected USD then clicked Edit. In Decimal Places field I changed 2 to 0.

Everything displays without the decimal to give me nice and clean numbers, even on the Zen Cart order receipts... But when I get my merchant receipt I see that the actual amount with change has been charged. For example, instead of $32, I see $32.40 in the actual charge amount.

Any idea why this would be happening?