I have a presonus 24.2.4 running into a pa2 and to a center cluster composed of three community speakers with a dual 15" sub. I've tried a number of setups but we are settling on running mono, but I'm running into a little trouble with the setup wizard. It wants to check right vs left levels and I'm not sure what to there. I go through and tell it I'm using a mono setup but it still does the r vs l check. Help?