Ok, let me try to explain as briefly as I can; I'm trying to recreate the 2012 WEC season as realistic as possible. The first race of that season was at Sebring with a grid of 63 cars. The Sebring track I am using allows for that many cars to be run so it's all good. But for the rest of that season (other than Le Mans and Spa) there were only like 28 cars in the field, so I changed the max vehicle figure at those tracks to 28. Unfortunately, when I started the season at Sebring, it too only allowed 28 cars. I posted a question about that here at Race Department and it was explained to me that the game will only allow as many cars on any track as the lowest max vehicles from any tracks' gdb shows. I changed the max vehicle figure to 63 in all of the tracks and my Sebring grid was full again. Unfortunately, when I got to the second race it did exactly as you said and randomly filled the grid with cars that did not appear in that race, even though I had correctly entered the vehicle filter for each track and Classes line in the car files. Also, I actually did take a look at the Simbin 2003 Championship gdb, and while most of the tracks show a max vehicle of 28 to 35, the max at Spa was 53, so now I'm confused. Since the game would obviously allow 53 cars at Spa while limiting the other tracks to 28 to 35, why is my Championship not working properly? The only real difference I could see between my gdb and Simbins was the race at Spa in the event order was shown as "Special Event = ENDURANCE". Must I enter that line in the event order for Sebring and Le Mans for my championship to work properly?