Microsoft account with multiple login options

[Phil in Beech]

I'm cleaning up my password manager and find 7 log in options for live.com. I only have one profile and one account and they all log into the same account despite having different passwords and log in id's. I would like to simplify this but before I just delete 6 log ins, can anyone help me understand why they all exist. They are variations of using my mobile phone number and different email addresses with different passwords, but they all open the same Microsoft account page (which is good).

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