Strange Problem I Have

Hey guy's have a little issue here.I am on my Dell Laptop I am not at home.My Laptop is a 2006 Dell I had copied my Surfliner Route.Too my Laptop witch dose not have.All the assets I had used for my Route it dose have all the Tracks.I had used today I was in world editor I came across a section on my Route.Where the Tracks were missing,But here is the strange thing when move my mouse where the Tracks are located.I see the double yellow lines not sure.What is gong on here but threw out the Route the Tracks are showing. Now on my Desktop PC I have all the assets for my Route I have not.I have not been on my Desktop PC for a week now. I have TS2013 & Steam on my Desktop & Laptop so I am hoping I do not have this issue.On my Desktop at home if I do how do.I fix this problem I am having?