I have a problem where when I try to sign in at times, it takes me to a page where it says too many devices are being used. I click on there to remove a device and it's signed into an iPhone. I have never had an iPhone. I have removed it a few times but apparently I went over the limit and this month and it says only you only remove a device two times in a month. So now I am stuck with the only option of upgrading if I want to access my notes! Why does it keep signing into some unknown device and how do I stop it?