I have an order that needs to cancel one item on the order. I see that in the edit order page I can add/subtract/edit items but what happens when I do this?
Does this re-process the credit card. If the order amount is less than the original, how does it take care of that with the CC processor?
No, that is a manual process by you. It only removes the item(s) from the order and recalculates the amounts.