Hey Bob, not sure I can help, but it is not unusual for your speakers to be set at different dB levels. Your room characteristics will have a part in what the ending dB level will be. Here is my setup. I'm not sure what the error is your getting.

Left m60ti 6 dB
Right m60ti 5 dB
Center 7 dB ( I purposely set this higher)
Sub -4dB
Right Qs8 7 dB
Right Rear Qs8 6.5 dB
Left Rear Qs9 6 dB
Left Qs8 5 dB


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85