We must advise that the specific voucher that you used was for a $5 drink, not $5 off the total price. This is why your order did not get charged with $5 off the price but rather reduced the cost to $5.

Please ensure that you check the terms of the voucher you are selecting, prior to selecting your drink. Once you reach the end of the checkout, you will be able to see the price you are about to be charged to make sure it is correct.