By repeating all these steps again I appear to have removed 2nd "me", however only by accepting my user name as " First Name, Surname". I have renamed all the folders etc to "First Name" only so why...

I don't want to use any password or PIN but I have tried it - 2nd "me" remains.

I'm not, I do know the difference. I have in fact tried both - neither removes the 2nd "me"

Tried that, doesn't work.

When I try to sign in after a re-start there are 2 of me, one of which says my password is incorrect (there isn't one at all) and then requires I amend my user name (adding my surname) to sign in,...