Hello Allan Park,
Welcome to Microsoft Q&A forum.
A Microsoft account can only be linked with 1 Xbox profile, so the situation of 2 Xbox profiles on the same account shouldn't exist.
In this case, can you please help me do a little test first? Can you please open an InPrivate tab and sign in to the Xbox official website? Once you are there, can you please tell me which account do you see?
I'm waiting for your reply.