As the mod team we have not looked into this previously but i believe car mods from the workshop should not be permitted due to the fact that parts used in these mods can or may provide an unfair advantage in the game. As such we have been forced to double check certain runs and we apologise for the trouble this may have caused. We also urge you to submit new times using cars from either the base game or the licensed DLC's and look forward to your future runs.