I have two Xbox Ones and a Windows 10 PC. I have one Xbox One set to Home, the other I need to be logged in on. Essentially, a "standard shared live account" setup.
Over the weekend, my Son, logged in on the HOME xbox was able to launch SoT fine. I was able to launch SoT on my Windows 10 PC fine. My daughter however, who was logged in with HER Xbox Gamertag on the xbox that I need to be logged in on as well, was not able to as each time she attempted to launch kept getting a "you're already logged in elsewhere. Do you want to sign in here instead" (or something close).
What is happening here? Why does SoT look only at the account attempting to launch SoT but also the additional accounts signed in?