Hello, this is my first Presonus, thus my first experience using the UC and it's provided mixer. I was told the mixer was suppose to be extremely flexible, but I'm finding it to be the opposite. For some reason, any I output from all the lines will output through the main outs (line 1 - 2), and the only way to prevent this is by bypassing the mixer. Is this really the only way to achieve this, or is there another method to remove the other lines from being monitored by the mains? I cannot seem to find how to do this on the UC.