When recording files on the mixer on multi stream if selected, it creates what appears to be dual mono files one for each of the Left and Right channel output.
It doesn’t create a single combined Stereo file.
So if you have no L/R panning on any channel in the mixer are the Main L and R files identical. ie could you use either of the L or R mono files to create a Stereo file in your DAW?
Cheers
David