Last night when my Mac iOS 10 was restarted I noticed that in addition to my name login, there was an "other" login. In my Users and Groups only my name is selected. The guest user is disabled. There is no "other" visible in my Users and groups. This morning I closed and re-opened my Mac and only my login is visible. The "other" login is now gone. That seems strange. Why was there Other user login last night but not today? I do not have remote services permission that I know of. What should I do? I do not see any advanced options to change root users.