I have some track laid down and then I have some track overlaying that. Now I want to raise one set of the tracks up, but when I put the number in the height block and pick the track it lowers the track instead of raising it. I'm thanking the land is at 0 so if I put a positive number then it should go up and a negative number should go down. No matter what I do it goes down. I'm working in HD terrain, so if someone could help me out with this problem, please.