Default User Name in HKLM-Winlogon & change in MSaccount log in

While inspecting the HKLM\Software\Microsoft\WindowsNT\Current Version\winlogon I noticed the Default User Name still holds a previous record of previous ISP email address existing previous to Jan 2015.
I did go into the Microsoft account and change the default email for the Win10 Microsoft Acct when I changed servers.
Obviously, there hasn't been an issue with this inaccurate registry default user entry but I wondered if it should be changed in the registry.

The reason I went to that registry entry was due to the Pin log in routine.
Yesterday the pin log in was not acceptable and I had to use the original password. The Anniversary update kb3189866 has been installed for a few days so it isn't a direct result.
I thought it might be connected to the fact I was trying to get a share working from the laptop(Home,MS account) to the Desktop (Pro, local account, no log in).It was an unsuccessful effort.
This morning the laptop log in was a choice structure -use password or use pin-2 icons. Previously I just started typing the Pin into the log in bar.
Is this the log in routine now?

Just a followup to the two icons for a choice of log in with password or with pin.
Yesterday I assumed it was a change of log in format after the recent update. I clicked on the pin icon and logged in.
Today the login screen was back to the usual empty box waiting for the pin- no extra icons displayed for the choices.
Who knows what was happening but it has resolved itself somehow.