Not all inputs showing?

[abentley]

I've just managed to jam with my band, but the "Personal Mix" settings aren't showing every input.  Two of us have two inputs: guitar and voice.  Under "Personal mix", I only see voice for my bandmates, and they only see my guitar.  But I hear the other guitarist's vocals and guitar, and his guitar is plugged directly into the audio interface, so it can't be mic bleed.

Under "Audio inputs", I see two entries for myself, and my bandmates see that for themselves, too.

They are on Mac, I am on Windows 10.