But cars need to be *going somewhere* to be properly sorted in a classification yard to get onto outgoing trains.
His train is terminating in staging with cars that are going "off layout". The issue appears to be that the car forwarding system he's using doesn't assign them new locations until a new train is "built" by the system from staging.
There's a couple ways staging can be dealt with:
1 - you assign new destinations/loads to cars in staging, and then get the appropriate cars onto trains (involving some shuffling and fiddling around of cars)
2 - another popular method is you take all the cars from a train that arrived in staging, assign all the cars in that train new on-layout destinations so that the new train is ready to go with all the exact same cars.?
One very obvious point is that staging and sorting yards are very different things and don't work the same. You can't really achieve both things with the same yard.
Switching/sorting of cars does not happen the same way in staging.
I'm a little confused as to how you're handling your yard when you mention cars coming in without destinations and getting sorted. It sounds like you're doing classification here, but your trains built in staging should really come onto the layout with all the cars going somewhere.
Chris