Hi Burkard,
Thank you for your suggestions. I went ahead and walked through the manual again, but no luck. I think it may be related to a recent IOS update that I did. I have both main and monitor link volumes checked on the output screen as well as the Vol. LED Collar set to the main stereo volume under system. The issue is that the master volume will not link to either the main or monitor output levels as assigned under the options menu. I'll check to see if I can roll back to a previous update. I did the update on a really old mac, I wonder if I should try the update again on a newer one.
Thanks again