Ok so I have this weird problem with the track on the route I am playing with. The main line has two tracks on it. At one point it has switches to let you cross over from track 1 to track 2 and then ahead of it from track 2 back to track 1. The section of track in between these two points (track 1) seems to be off limits for some reason. All AI trains will run around that section and avoid it at all costs by switching to track 2. If I place a track mark on that section for an AI train, using the navigate via trackmark option that trackmark cannot be selected. Also, I can drag the track mark back along the track, but once it passes one of those two switches, I cant move it back onto that section without deleting it and making a new one. Manually driving a train on this section works just fine, except if I place a signal in front of it the signal is blank and says it cannot decide on how to proceed or something to that extent. The problem I see starts near a spline point behind the first switch. But when I attempt to remove the track and lay new track the problem just moves back to another spline point. What's going on? Do I have to retrack the whole section? This makes no sense. I would post pics but I dont know how.