The order confirmation e-mail is just a confirmation that your order has been placed. It contains the order number, items ordered, total of the order, payment method on file and your account information. It does not give a breakdown of the payments applied to the order. Gift certificates and vouchers are forms of payment, not discounts, so if they are used on an order the amount listed in the order confirmation e-mail will not change. The payment confirmation e-mail will state exactly how much was charged to the payment method listed on the order. You can also view the order details by clicking on the order number in the Itemized Order History section of your account page to see exactly what payments were applied to your order.