I believe that the inquiries are still all listed, because they all happened. But they are grouped together for purposes of calculating your score.
Now, if the inquiries are categorized incorrectly, you could write to the credit bureau and ask them to update it. For example, if one of the car loan inquiries is listed as a general unsecured loan, then it might not be grouped together with the others, and that might be something you could fix by writing a letter to have it re-categorized.