You should check out this thread for some information on how to have “true mono” on the Super 6.
I believe the problem could be that you have the LR phase at 0, when it should be maxed out. Let me know if this fixes your problem!
On another note, I would love to be able to have mono sounds without going through this process, but I’m not sure if that’s possible on the Super 6, given it’s stereo signal path.