Auto-replenish orders that have the exact same order date, shipping address, billing address and payment method will ship as one order.
If you have more than one auto-replenish product and want the products to ship in the same order, go to the “My auto-replenish Products” tab within the “auto-replenish” section in your account on livingproof.com and change the next shipment dates to be exactly the same. Also, double check that the orders are going to the same shipping address, have the same billing address and same payment method. If you want them to always ship together, set their frequency to be the same as well.