Notifications email switches back to old one after login

[wroot]

I have registered here with email1 (my MS ID email). But i want to get notifications to email2, as it is my main email. I have switched email in the settings. But every time i have to relogin here, i use email1 as username and then it switches it to email1 in the settings. I need to only change my email notifications email.

[#2]

I don't understand the point of this setting. I can change the email, but i can't login with new email providing my MS ID account's password. Because it expects an MS ID to login. Why this setting is there even?