Waggons get lost

Hi,
I just tried a lot of times to do the information trip on Marias Pass. But everytime I lose all the wagons on the track. Sometimes only one of the two locomotives is that what I bring to
Shelby.
What kind of mistake am I making??

Minosch

I think your problem is a bug in the program. I have experianced problems around Cut Bank with cars uncoupling but have been able to recouple and continue.