Bots able to drive cars outside a series

There is a series that has a bug which allows the bots to drive cars that aren't allowed in the series. They could drive BMW M6, Mclaren Mp4-12c, or a Ford GT I wish I could upload a screen recording, but it's too big. This will be a major problem because the Mclaren mp4-12c has unfair acceleration when I complete more tiers.

The series name is "Real Racing Redux"