MainStage channel levels and patch changes

Hi all,

I am having a problem that is extremely mysterious, at least to me:

I am building a concert with just a few patches. Each patch has 3-4 channels assigned to two keyboards. Keyboards, pedals, sliders, etc are all responding as normal into MainStage. However, I cannot get MainStage to save channel level settings per patch. I get levels set for patch 1, hit save, then go to patch 2, and set levels and hit save. When I go back to patch 1, the levels aren't there. Patch 2 levels simply remain. Whatever is the last patch I worked on, those are the levels that appear in every single patch.

I have tried changing override settings, creating screen controls, it's just not working.

Does anyone have any hints or know of a tutorial?

Thanks in advance for your help!