To address both your 'points':
1: The Freemasons have never had a problem admitting membership for various individuals, so why would they make an exception for one ultimately unexceptional man?
2: No, he wasn't buried in a 'Masonic cemetery'. The Masonic temple, which is across the street, was built many decades later, and is one of many in Pittsburgh, which is famous for that.
Just do a bit of research. Knowledge is your friend. That type of 'research' is what led many to become JWs in the first place.