We're all human, and every so often we make a mistake. Regardless of the reason, we want to work quickly to resolve the issue and get your order in your hands as fast as possible.
Regarding any shipment to correct an order error, our policy is to use the same carrier/service you paid for on the original order. If you wish to have the order expedited (e.g. overnight shipping) to a carrier/service costing more than the original shipping paid, you would simply need to pay the difference in shipping cost.
If you wish to upgrade shipping, just let the customer service rep handling your ticket know and they will take care of everything for you. Thanks!