The My Teams section on the left nav will show all teams they are a member of (with their signed in email address) and that are published by your organization.
The Profile, Members, Order History pages are linked to the most recent profile/or the one that was last saved on the parent edit page.
The advanced registrar role allows you to merge accounts so there is only a single profile.
Note: The officials module supports multiple profiles for a single email address for officials.