When customers place pre-orders for items that have not been released, we order those items from distributors. Sometimes, those distributors cannot or do not fill our entire order, and when that happens, we will allocate any product we do receive to orders in the order in which they were placed. We may limit such products to one-per-customer.
Additionally, release dates are provided to us by manufacturers as estimates. They are affected by publisher whim, the economies of foreign countries, natural disasters, acts of God, editorial disagreements, unfounded optimism, and simple mistakes. As a result, they are subject to change at any time.