6.3.1 Upgrade Hurdle - Rainbow Pallets

We are upgrading from 6.1.3 to 6.3.1. We are in our initial testing through the 6.3.1 environment. We have customers order in a variety of amounts, with no requirement that the quantity be a full pallet or multiple. In our 6.1.3 environment, the leftover items are mixed together into rainbow pallet(s). We are not getting anything in a rainbow pallet in our upgraded environment. Instead of rainbow pallets, these less-than-full-pallet quantities are planned onto individual full pallet THU and occupy a full floor slot in the 3D engine. 

Obviously we're missing a setup or two in the upgrade, but we've looked high and low and can't find the right combination. We do see the Logic Configuration Setups and understand that these give a more granular level of control to pallet building. We've made some tweaks to attempt to get it to work but, again, haven't found the right combination.