I just checked myself… I booted my system in SAFE MODE.

On your log-in welcome screen, you should see ADMINISTRATOR and your personal account (with your name) with administrator rights.

See my attachment… if you are loged in as ADMINISTRATOR, you should see all those accounts that you can see in first picture (top one), and if you log in under your personal account with your name, you should see those accounts from second (bottom one) picture only. As you can see, no ADMINISTRATOR accoun is listed.

Both situations are when I was loged in under SAFE MODE.

So, definitely, you should see ADMINISTRATOR account under USER PROFILES, when you boot in safe mode, and log in (from welcome screen) under global ADMINISTRATOR (not under your personal account with your name - there is a big difference)