Mass Confusion with new mobile 5 and above monitoring

Ok it says on 5.0 and above android you have to set yourself the parent as owner which I did and the child as the second person which I did and add the norton on mine as the parent mode and the child on his account which I did.  What prevents him from bopping in and out of accounts to freely see other websites without supervision?  He is old enough to figure out this stuff ... or is it as long as I'm on the first account with Norton I see all apps, texts, web not matter what account he bounces around to?

 

Thank you