The "8" numbers are Google's numbers. OpenDNS's numbers are the ones I posted.

I believe macOS uses the top number by default and uses any others in order if it doesn't work, which, I guess, is why they come in pairs.

Are you still getting the error?

I think you ought to follow joemike's suggestion and boot into recovery and run First Aid from there.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire