Why does it keep autosigning in the wrong account?

So I got a new pc. Wanted to download some of my xbox games on it. Thought it would be easy like steam. You know. Type in your username and pass. Well nah, it kept telling me to make a new account and the sign in button on the top left didnt work. The store, and my computer use my microsoft email. I was like “fine ill create a new account then sign out and sign into my real account.” Well now it wont sign out. If i hit sign in it will automatically sign into the new account regardless. Even when im signed in on the internet and in the store and my pc. Idk what else to do. Later i decided to sign out of the store and back in. Now i cant sign into the store at all. When i click the manage buttons, it takes me to my real account thats signed in on the web. But wont allow me to sign into the app. Im so glad im leaving this broken bundle of garbage

:)