Sorry about this.  I don't know how it happened.  

I intended to login to my usual serverfault account.

     https://serverfault.com/users/243018/johnz

I logged in with stack exchange id (which is my gmail account and server fault password).

As a result I seem to have inadvently created a new serverfault account ...

     https://serverfault.com/users/251018/johnz

UPSHOT ---

* I do not need to keep the new 251018 account.  Can it safely be deleted?
* I should like my stackoverflow account (https://stackoverflow.com/users/1403571/johnz) to go back to display https://stackoverflow.com/users/1403571/johnz and https://serverfault.com/users/243018/johnz.  This is so that I can keep track.
* I wish for https://stackoverflow.com/users/1403571/johnz to no longer linking to https://serverfault.com/users/251018/johnz which was created by mistake

Apologies for the mix up.