Managing personal Outlook.com account settings, security, and privacy
Greetings, David! My name is Arif, and I will assist you today.
I am sorry to hear that you are facing this issue. I hope I have understood your concern well. Are you saying that when you try to log in to your account on a web browser, it suggests other accounts and when you click on them, it directly logs you into the other account? If that is the case, please try clicking on the three dots button (...) on the left, go to Settings > Passwords, find the account, and delete it. If you need to note the login details, please view and note them before deleting the account.
If the issue still persists, please try saving all your bookmarks and fully removing the browser. Then, reinstall the browser and check if the issue is resolved.
Warm Regards,
Arif