If it's the hyndman helper scenario with locos blocking your path at Cumberland yard and you push the locos with you, this is what happens. It’s a known problem. There are some work arounds, including switching the locos to a different track. Spawning on foot a little earlier than the service is another one.
The map indicates I'm on the correct track for my target, and both tracks are red with no other trains anywhere close. The map doesn't allow me to control crossovers, just sidings. I'm just kind of stuck there with these 2 locos on my nose.
As mentioned elsewhere, just push the locos on to the adjacent track, uncouple, back up and proceed, using the map to move switches as needed.
The yard switches can be controlled. As soon as you meet the two locos, uncouple your train, manoeuvre the rogue locos (your map will lose its blue route line), set the switches back and rejoin your train (your map will regain its blue route line). You should be able to continue after this.
Well that worked well, once I figured out what you actually meant. I assumed, based on the title, that I was supposed to push these two locomotives up to Hyman and probably drop them off at a siding somewhere and then continue. Once I ditched the extra two locomotives onto an adjacent track, and then proceeded I was able to get past that obstacle. Thanks for the advice.