Keeps signing me into the wrong Minecraft account

I have multiple email addresses. Let's call the relevant ones Address A and Address P. I use Address P for most things, but Address A for Minecraft. I've been playing on Account A for over a decade, and would like to continue to do so. However, when I try to log in using Address A, it switches to Address P and asks me to buy the game all over again. How do I unlink the 2 addresses so I can play on my regular account? I don't see Address P anywhere in my Microsoft account settings.

:)