That little discount was what caused the problems with what the email says was charged and what the printed invoice in the box says was charged. Credit cards are being charged correctly. Nobody has been overcharged yet. Also, no one's card was charged immediately upon ordering. Every place you buy something from and use a credit card (local stores, internet, restaurants, etc), places a hold for that amount of money on your card so that they are sure to get their share. The hold shows up for a temporary time period (like 24 hours). It's not an actual charge and won't appear on the bill until it's totally cleared and done. I saw the temp hold on my own card (which is not a real credit card but a Visa ATM card) but still haven't seen where it was charged on my statement.