you did not do it right, did you follow step one. show me a pic that you have followed step one a pic of your login will do.
the one on the left is the admin of this pc and users
the one on the right is admin of the current user only
I need to see concrete proof you did follow my method before I say this did not work.
you can only use admin gomer by login for rights to all users
this pic will show the difference of permissions