Can we prevent multiple entries?

I realize that the website is set up for “One Gun/One Entry.” Our club limits the total number of shooters and our policy is that to sign up for the second gun (usually a PCC shooter) you must do so in person.

My biggest problem is that right before importing the match to the the tablet I have to delete duplicate names. It would be nice if we had a setting that would prevent multiple entries under the same email address. Is that possible? If it’s possible, what problems would a setting like this cause?