Norton ConnectSafe blocking a lot of sites

a week ago i started getting certificate errors from a lot of site using https

like outlook and facebook and many

The certificate is only valid for search.dnsadvantage.com

The security certificate presented by this website was issued for a different website's address.

at first i thought that i have a virus then i scanned the pc with a lot of anti viruses other than norton and all shows that my pc is clean

then i thought that my connection is not secure i connected my isp all good

until there is nothing left other than Norton ConnectSafe dns

and after i change it everything seem to work fine

so is there is an explanation about that i used norton dns for over two year now and it used to be very good what is happening

what the hell is  search.dnsadvantage.com

why it blocking sites that is clean

and mostly how the hell would my connection to sites like outlook and facebook isn't secure

The security certificate presented by this website was issued for a different website's address

seriously sites like that would have certificate errors

and before any one tell me to change the host file or clean your pc i have done a lot of search and cleaning until i changed the dns all work fine it was the last thing i thought it will be the problem and it's really waste of time

what is happening ???