AHHH..Yes, Thanks guys. I should have thought of that before I posted. I know that there are stations that they do not stop at unless they have pax to pickup or drop off. I am thinking Benson,AZ (not far from me) is like that. Now it all makes sense!
Well, no, not exactly. Again, look at the timetable. It shows some kind of squiggly mark which shows Benson as being what is called a "flag stop". That is a time honoured railroad term which means a train stops only if somebody is getting on or off. But flag stops, too, are at a definate time, it has no relationship to leaving early. Benson is not nearly close enough to Los Angeles to be a" discharge only" stop.
But on that same train, the Sunset Limited,(again look at the timetable) you will see "D" at Ontario and at Pomona. Those stops, rigtht next to each other consistently in a row together are stops where the westbound train can leave early.