I don't use Navigraph updates, partly for the reason that you talking about.  So can't help you with that one.

By the way, I am talking aobut the normal distance to TOD seen on the VNAV cruise page, and distance to first altitude restriction seen on VNAV descent page.  I always have a full route input even if I have to change it later.  I will be coming up to a descent here in a few hours.  I am flying todays Saturday Scramble into the NY area, KPHL to be exact for EHAM, should have full ATC.  I will be able to give it a full shake out and hope I am not the one shaken out. ;D