How do I combine items to be in the same order?

Subscription 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 Subscribe & Gain™ item and want the items to ship in the same order, simply visit "Subscribe & Gain™" section of your Bodybuilding.com account and change the next order dates to be the same. 

Also, confirm all orders are going to the same shipping address and have the same billing address and payment method.