BF gets signed out of his Xbox during games and into mine

I'm wondering if anyone else has had this problem, if they can explain why it happens, and/or how we can fix it.

My bf and I share an apartment together and he has his Xbox One in one room and mine in another. A few times now, while he is playing Halo on his box and I am playing Skyrim on mine, I will get a message on my screen saying that his account has signed out of
my box, even though I never signed him in and he has been playing under his own account on his separate box for hours. Then it will say Hello (to his account) and he will very quickly be signed out of his own box.

- This has never happened in the reverse, with myself randomly logging out/into his box. Only his account on my box.

- He has a kinect, but I do not.

- Possibly unrelated, but we've both also had our boxes turn on at random. It's only happened once each, but it's still weird.

- Both of our boxes are wired to the internet.

:)

 

How does Xbox live and game sharing work?

I received an Xbox 1 for Christmas. My brother had one already with games he bought. He suggested gamesharing his account onto my new Xbox to save me money. We logged into his account on my Xbox, made it the home account, and downloaded his games onto my
Xbox. I signed out of his account and signed back into mine and changed the home account back to mine. I paid for a one month gold membership. However, it is not letting me play online in my games. What did I do wrong and how do I fix it to allow me to play
online?

 

Game Share

So recently my brother got himself an xbox one s and I started to sharing my games with him but he needs my profile signed in on his xbox and every time i signed in on my xbox and i start playing, my profile automatically signs out of his xbox and the games
i shared wont work anymore. Is there a way he can play my games without having my profile signed in on his xbox and for me to be playing on mine without having any issues?