Comment 13 for bug 27608

So, you shared one of those directories as //server/giorgos, which, thanks to the default smb.conf with the [homes] directive in it, is already an export of your home directory (and can't be two things at once).

Is that more or less what I'm seeing here?

If not, please attach a copy of your smb.conf to go with this screenshot so I do know what I'm seeing. :)