[batonsa]

You have probably a StaticVehicle override from FS, meaning there is a AddStaticVehicle command somewhere in your gamemode that is causing the filterscript to overwrite it. Meaning like if you had a LSPD cruiser on slot 1 and then you buy a new car with the script that goes also on slot 1, your car will also be treated as an LSPD cruiser, even if its a tractor. I suggest you remove all staticvehicles from your gamemode, and try again.

Remember, a filterscript always overrides a gamemode.