NC State Residency Process - problems with account creation

Hey, hoping someone in NC state can help. My son is trying to create a student profile on the College Foundation of North Carolina, where he can provide instate schools with his transcript AND qualify for in state residency. However, whenever he tries to create an account, it says his student email address AND his personal email address are already used. BUT, when he tries to recover his password for either of these email addresses, it says the accounts don’t exist. Does anyone know anything about how this website works? Assuming it is a state foundation and all schools may pre-create the accounts. Just trying to get ahead of the application curve.