Reply to serrato Midi map question

4 years ago i had a padkontrol and was able to setup a custom map to do different things. I sold it 3 years ago.

I now have an APC40 and was trying to program it to control serrato. When i try to attach any knob to the left Gain knob, it will control both knobs. if i assign a different knob to the right gain knob, i will have two different controls that adjust both knobs.

seems like i'm doing something wrong or there is a setting somewhere i can't find.

any help out there?