As the title says the trains I blueprinted onto a vertical stacker turned out strangely in some cases, some of them showing up on the map with their locos and wagons sideways on the track. This translates to its hit box as I discovered while trying to run between parallel trains. When I get in one of the locos it just runs free of the rest of the train it's supposed to be attached to.
This is on 2012 Macbook Pro running Mac OS High Sierra
Above is the map view of the below scene. As you can see the graphics of the train render nominally but the hit boxes are rotated.