Air Nam takes 1700 lbs of fuel on that route. Same route same aircraft type. She take 1000lbs on that route. So I agree with with DOG.
PS. The ILS approach plates were modified and check in 2006. I guess Joshua Express has an outdated approach plate. Just a matter of interest. If you 15 miles out at 10 000 feet, there is no ways you can intercept the glide slope. One is supposed to intercept the ILS at 9.3 DME at 7400 feet. So it was not an ILS problem, but an error of judegment by ATC.