Did not function correctly

This was recommended in jetpack article but it did not work for me. The name (admin) was not changed when I checked it. I then tried to change it with another plugin but it said it was already taken, so I tried going back into this plugin to “update” it back to admin, and it said I could not because it was already taken. To fix the problem….I just created a new admin account with a new email, logged back in, deleted the original admin and then created a new user with the original email address and new name I was trying to update to.