Don't you guys get an email every time an order is placed against your Amazon account?
No, and that is the problem!! I get an email everytime MY amazon account charges against my credit card, but when a new account with a different name and email address was created using my stolen credit card details then I got no email about the new account and of course new charge emails made by the bogus account will have gone to the bogus email. I only spotted the fraud when I noticed charges from Amazon on my credit card that I did not recognize.
Amazon did not protect my CC details, allowing someone with a different first and last name to set up an account against my credit card, which they have on record.