I just received my 3 Lackawanna cars, and while running them on the layout, they go around about twice (small layout) and then the last car derails from the rear while running through an atlas code 80 'new' switch (straight run, not thrown). I then find the switch points were moved. They also seem to 'bump' through the 'new' Atlas code 80 manual switches. These same switches would not handle older Atlas freight cars, they would ride up on the points. Do I have a batch of improperly made Atlas Code 80 Switches? Or is there an issue with the Passenger car wheels ? I did remove the coupler trip pins, that didnt help. I cant get the cars apart to put some weight in them, as I dont know how to get them apart, and am afraid of damaging them as my fingers dont work too well. I am very disappointed.