It used to before i configured the aircraft. I got notified of a live update about 10 minutes ago, and now the loader uses the KSDF loading system
Yes, since one of the fixes was precisely related to this issue you reported.
However, the container isn't the correct one. It sticks out of the aircraft fuselage when getting onto the loader. The guy pushing it inside the building also has a bugged animation, i guess its due to the wrong container.
That's because you have specified "AUTO" as container type, which means GSX will either use a Belt conveyor loader OR an ULD loader, depending on the door's height so, in this case, it will use an ULD loader, with a default ULD, which is the AKH type, which is not right for a Main Cargo door.
The correct ULD for a 767 are the A1N and SAA, or the various Pallet types. Note that, you can now specify multiple ULDs, by CTRL+Clicking all the ULD types you want to use for that door, and GSX will select them randomly during the load.