I recently acquirred 3DTrains' Cajon Pass add-on to MSTS. I started up the Barstow-Mojave activity yesterday, and soon found myself in a corn field meet with another freight. I stopped and restarted the activity and manualy switched myself over to the left-hand track, and it proceeded from there normally. Did I miss some instructions that told me that I should do the switching? I assumed (evidently incorrectly) that CTC would automatically route me to the proper track. Any info on this would be appreciated. Thank you.

It is 3Dtrainstuff who did the route, not 3dtrains. Different people, try posting on train-sim.com