Lynx L22 calibration problem

The analog out in the lynx mixer shows that there is 6 db difference between analog 1 and analog 2.  I checked it with various programs (db meters before the converters ) and in the digital realm everything is fine.  It's the output that's off by 6 db (unless I'm doing this wrong.)  I tried the *recalibrate converters* button on the lynx program, but it didn't do anything.  I think I probably need to do something before I click the recalibrate converters button.  Any help would be greeted by enormous feelings of gratitude and satisfaction.