I now understand this isn't the way that it should be done so trying to set everything back to default, so I can set it up properly but the problem I have is that I've got one user left who I just can't remove thier custom permissions. I've tried everything and I just can't seem to reset it.
I've set the main settings as below:
They are not set as a Moderator or a Administrator,
and in the custom permission settings I've set everything to No.
but its still showing on this screen here:
Is there anything else that I've missed?