Possible Unison bug
When using the layers mixer and adding Unison to only one layer, increasing the number of voices will multiply voices on other layers too. I’m not sure if that’s expected behaviour or if there is something missing in my audio path so here is a simple test project if anyone wants to test it:
In this project I have a layers mixer with two layers. Only layer 2 is audible, but if you increase the number of voices on layer 1, layer 2 will get louder. Detune has no effect on layer 2.
here are screenshots of both layers: