My audio channels seemed to be locked together. Using the internal mic: If CH1 is set to manual and CH2 to auto, moving the levels dial for CH1 will adjust both channels.

If both are set to manual then the dial for CH1 adjusts them both and they stay equal. Strange.

go into the menu under audio input and go to XLR Rec Channel change it to CH1 only. It maybe under CH1/CH2. That should correct the issue.

Edit: I see your issue now. Very strange!