Wow.
This sounds eerily similar to my thread I started about a scenery object (a tree) that I can't "GET" or remove.
I too have a section of Auran track on the same route that is just there, and has been forever, and I have no idea why. I think at one point it was a road, but during upgrading of TRAINZ over the years, the road spline became a piece of track, but neither the track function nor the road spline function sees it or recognizes it.
I have been looking through the layers aspect. I did a SAVE AS and created a new route with NO sessions.
When I go into the layers area I only have the route and session layer, with the route layer highlighted.
Does anyone recommend merging the default session layer with the route layer and try? I'm somewhat afraid to do so, not knowing what the result will be.
Either way, several routes have issues like this that I REALLY would like to fix!