Comment 1 for bug 1478721

To me this is pretty much the expected behaviour. The owner of the files in /home/2 is not the same user as the one you created on elementary OS, it is the one you created on fedora.
elementary OS also rightfully deleted the actual account of the user (on elementary OS), that is why you can't log in with him, why he shows up in the indicator is to be investigated, but it's probably something to do with the home folder, could you test for that in some way?