Won't let me sign into my xbox live account.

So I share my xbox one with my dad,so I login to my account on the xbox one and for some reason it always asks me to put in my password and send a code to my phone every month.Well I started using a diffrent email a while ago so I added that to my microsoft
account and made it my primary.So when it was time to put in my password it still said my old email and also made me send the code to my old email as well.I just ignored it and put in my password and sended the code to my old email,but when I put in the code
it just asks me for my password and sends me another code over and over again so I can't get into my account.It also won't let me sing into my account when I press "I don't have any of these" and when I put in the letters and numbers it shows.Most of the time
it won't even let me press "next" or "I forgot my password".Im very frustrated and need help.

:)

 

Accounts

I'm using my brothers account rite now because my other account won't let me sign in because of this proofs thing and I forgot the emails I used to make that one because I made it when I was young and dumb. I can sign into that account but it won't let
me sign into xbox live. Pls help

 

Won't let me sign into my account

Every time I'm trying to log on to my account it's saying " error 0X87DD0006" please help

 

I would say you have a security prompt set i would check any settings regarding a security check.
account.microsoft.com/privacy - this link may help you sir/ma'am