What about the blank backs? Non issued I would say. Do we really consider the Br Lenox to be a color change approved by ALC or just a one off batch like the OMs?
Johnny maybe you need to start an error run/checklist subset
Being that there are plenty of blank backs, but no blank fronts I'd assume the fronts are printed first and upright. It's possible then that the sheet was flipped so the backs were added with the fronts upside down. This would lead to the backs being considered upside down.