Need For Speed :: San Andreas

This bug happens to almost all cars. After putting a vinyl to "rear" part of the boot (like on the picture) vinyl appears on the spoiler too.
It's almost impossible to avoid it (excluding spoiler removal).

please fix it asap. (if it's possible ofc)

https://imgur.com/a/h5jyi

edit: new ss: https://imgur.com/a/WzFoy

You know, almost every car has at least one mapping bug..