Setting up project for first foray into Atmos. Already made 5.1 mixes, did a Save As for the project, then began reassigning groups to new 7.1.4 output. Two groups are showing up correctly. But other groups, routed to the same output are defaulting to the old school Surround Panner rather than the VST Multichannel. Why is this happening - how can I switch to VST Multichannel so that I can make the group an object in Atmos?