Please Help Now: Bad Safe Site

I am new to Norton Online family and was setting up a computer for my grandson.  I purposely went to a porn site and it was rejected.  I went to the reporting site online and tried to remove the fact that his account had gone to that site.  In the process, I clicked on a link to the "Is This Website Safe" page that listed that porn site,

            https://safeweb.norton.com/report/show?url=yuvutu.com 

 

and clicked on the text "Is this site safe"   expecting to read what Norton had to say about it.  Appearently what I did made it "safe"        It is a porn site.  I can't figure out how to put it back as a blocked site.

 

Can some Norton expert  or forum administrator fix this, ASAP.   Then post what I should  and should not have done.

 

I am deeply sorry, and I hope this can be fixed rapidly before any child goes there.