I am currently having the same issue. I attempted to delete the car that was overriding the others, but it only deleted the next car on the list. I had to reset the program to all default settings to get rid of it. The other issue I'm having is adjusting the tank size of the vehicles. No matter what I change the tank size to, it remains at 100 during any practice or race. When I return to the car setup portion, it still shows the tank size that I chose. Is there a setting that I'm missing?
I hope someone here can help us out.