Why does the arrival date on my backordered item change?

Backorder dates are based on the individual manufacturer's estimated delivery date to us and are subject to change without notice. We are in continual contact with the manufacturers and ship backordered items as soon as possible. However, there are unforeseen circumstances that delay items. We update our information as soon as we are notified by the manufacturer. Please be assured that we are working hard to fulfill your order upon receipt of the merchandise.