Wrongful Bans

I have gotten 2 bans recently that I understand, but really do not like. I have not exited the post game lobby, but in the first case I switched games completely and in the second I went to the Xbox home screen; so I was not playing the game anymore. How does the game not recognize that I left the game completely? Really annoying, anyone else experience this?

Please use the ban thread pinned at the top of the support forums for any queries on matchmaking bans