Honest diaper bundle subscription

I tried honest diapers and really liked them for my daughter, no blowouts and didn't cause bad diaper rash like Huggies and pampers. I signed up for the subscription while they were running a promo buy your first bundle get the second free. I signed up and got my first bundle but when I go in to edit my next (second bundle) it shows me paying full price. Was i suppose to do two bundles at once to get the second free or does the second just come free when it comes time to ship? I entered the promo code when I checked out the first bundle. Im confused!