Just a slight amendment to the procedures,you can switch both fuel levers to ON and then run through the startup procedures as i described.
I have tested FSX with both profiles for the Leveld 767 stock and mine and i get the same for both.
Occasionally you may get "Engine freeze" where nothing moves/sticks at a certain percentage as you describe and yes it did it across me today when retesting,that is beyond our control and FDC's.
It doesn't happen with FS2004,that's why i prefer this sim to FSX,just my personal opinion