DOH!!! Touche' John T...of course the computer calculates by row, I realised my error as I was thinking of the end result. The printed loadsheet displays pax loading by zones.
As for the 767, unlike the A300, you cannot load AKE's (LD3's) side by side. The hold is too narrow. From memory, I think it was LD2's only or pallets (enclosed types as well). Then again, you could've bought them with narrow FWD doors & an engineers seat, that really made them good value!! NOT! I'm trying hard to remember, but I'm unsure about lateral calculations when using LD3's. Most definately on the 74F's & Combi's, that was fun!
Checkboard, cruise is not as demanding on the aircrafts trim as takeoff & landing. Balance is everything during those latter two, however, in cruise, it's just a matter of setting the stab trim to accommodate the CoG. In your case, I'd say they were burning more than efficient amounts of fuel on that leg as it would've been tail heavy & required plenty of trim.