Yes, sorry, was a bit unclear the way I wrote it. What I meant is those that track at 0% progress. If you look in the list of expedition members, you'll see that I show up as 0% (#263 in the list) while I'm really at Waypoint 22. Now I don't use EDD since I can't get it to track me and don't quite want to put much time into fixing it, but I did attempt to manually update my position at one of the earlier waypoints and still EDSM doesn't update my position to the progress at that particular waypoint either. Had it done that I'd have manually updated at regular intervals, but as it stands I'll just leave it be.
My point was that if I'm experiencing this kind of difficulty others may very well do so as well. A little while ago I did check about 30 commanders that were at the waypoint at the time and found that quite a few were neither tracked on EDSM nor on the Google sheet, so I'd advise against using either of them for determining how much of the fleet is still along for the ride - we can determine the minimum number, but have no indication of the maximum number.