The system will not allow you to add two people with the same email address. PerfDog currently uses email addresses as the unique identifier for each user, which is why you can't use it for multiple people. Our current workaround for this is to use a dummy or placeholder email for the other individuals.
The placeholder email should be the owner's-first-name-dot-owner's-last-name-at-perfdog-dot-com. If Roy Rogers is an owner and you don't know his email address, you would use [email protected] in the email field.
If it's Jim Reed, use [email protected].