Have you ever made a big purchase on Amazon.com and mysteriously, next week, reversal of the transaction is pending, but you've already received the order?
Never with Amazon, but had a similar experience once on another site. I received the item/delivery, and then got an email saying out of stock and my refund would be processed.
Have you ever ordered stuff with multiple items, called them and complained about not receiving an order or the tracking number, then few days later same exact order arrived twice?