Thanks, Steve,
What you suggest makes sense. In fact, it is essentially what I did when creating Randy3. However, it has some undesirable consequences.
It would remove everything I had set up for Randy2. I have certain programs only showing when logged in as admin Randy2 for example. And many programs have had their defaults changed. This could include default data directories, printers, etc., all stored in the Randy2 profile that would be deleted. I don't know of any way to save the Randy2 profile, delete Randy2, create a new Randy2, and restore the old profile.
Right now, I am just taking the path of least resistance. I can access Randy2 by allowing Show Last User.
I should say that your post did just give me another idea to try out. As I noted previously, Windows 10 did not let me change the name Randy2 to Randy2. I tried that in case there was something weird but invisible in the name Randy2. But Windows said Randy2 already existed. Now what if I changed Randy2 to Randy2AD? This would not delete the profile, just change its name. Then I could see if a logon without showing last users works with Randy2AD. If that was ok, I could try changing Randy2AD to Randy2. Or I could just leave Randy2AD as my preferred admin logon name.
I'll report back.