Maybe it's just me but I can't figure out how to do anything with the back panel inserts on this thing. They do not feed to the headphones so I'm limited to the front 8mic pres and two 1/4" inputs. The interface only shows channels 1-8 in the drop down menus for each output channel, no way to tell these channels to go to headphone mix. Am I missing something? Do I need to only be using channel 1+2 outputs instead of phones (haven't tried this yet, just thought of it)? The manual is pretty much worthless.