I am having trouble with the audio matrix not working when channels are set to dual mono.

I have the following set on one of my inputs

1 2
MASTER L X X
MASTER R X X
HEADPHONES L X X
HEADPHONES R X X
BUS A L X
BUS A R X

Channel 1 is my commentary, channel 2 is the camera mic, what I'm getting on Bus A is both channels of that input, including the commentary, which I do not want.


When I switch to normal stereo operation, this matrix works as it should, but dual mono it does not. I need dual mono so I can have my midi faders control each channel independently.