I've bought 4 turnouts (2 left, 2 right) to make a small layouts with the E-z Track, 2 turnouts wont work when the train is going into the Y from the track by itself. Ive unscrewed the bottom and made sure everything was fine and it was i even filed the middle piece(i dont know the name, Im new to the game frog maybe?).  but the engines keep coming off because the back wheels always go straight if im trying to turn or vice-versa. if i push a car along it works fine.  So I dont know
                         ANY SUGGESTIONS?