Remember alot of the weight on the aircraft is fuel.. so on a B767, my guess would be, yes, that there was alot of cargo in the forward hold, and/or that the amount of fuel onbaord required more weight in the back to move the center of gravity and get the a/c balanced.
I stand corrected, but I as far I can remember, there is not left/right balance. The fuel loading is the main factor here with the amount of fuel in each wing - but pax are right in the middle of the vessel, having so little movement to play with between left and right weight. I'm not a pilot, but if I am right, the x-feed would be used to correct an imbalance between left and right tanks...