Auto-Replenish items that have the same order date, shipping address, billing address and payment method will ship as one order. If you have more than one Auto-Replenish item and want the items to ship in the same order, simply visit the My Auto-Replenishment section of your account and change the next order dates to be the same. Also, confirm the orders are going to the same shipping address and have the same billing address and payment method.