#1 I saw your other thread about this issue.
At first you said a firmware upgade fixed the issue but then you changed your mind.
#2 While I know you have FIOS Internet, do you have FIOS TV?
#3 As addressed on https://www.grc.com/dns/spoof-faq.htm
..Very few small office home office (SOHO) routers make good DNS resolvers. Mostly they just get in the way and add no value whatsoever. They don't cache, they don't accelerate, they merely catch and forward DNS requests from inside the network to the public Internet. They're just in the way...