Bobets20

I'm having trouble with a few of my slots going in the opposite direction On an analogue track I have 5 scalextric slots (2 of them are Holden commodores that came with the analogue Supercars set) and an SCX. the 2 Holdens and the SCX run in the opposite direction after I added additional track. has anyone encountered this problem before? How did you rectify it? thanks