I had to laugh, because just yesterday my wife was venting about a similar situation. She'd placed a first order with an online vendor, for half a dozen items, and received multiple "confirmation" emails, with different confirmation numbers -- and all showing the same items. Confusing, not at all typical, so she called the vendor to make sure the order wasn't somehow submitted multiple times. The response? "Oh, that's just the way we do things."
No interest on the part of the person taking the call in using the opportunity to learn how to improve their relationship with their customers. Sad, and that company probably won't get any more of her business, either.