To clear up the confusion: Google has that UI, but it's legacy. They no longer allow you get your account into that state; new G Suite accounts and personal Google Accounts can't use the same address.
Then, an admin who proves they control the entire example.org domain registers it for G Suite, and creates a 'crb' user.
You now have a conflict account situation: https://support.google.com/a/answer/7062710?hl=en
Also, when signing up the Google system will not allow you to use the same email (if it's registered) but once you "take over" or verify domain ownership, you can then claim / use that address - which I believe creates this situation.