Why did they copy so many mason symbols vs making up their own.
Because the symbols commonly shown to belong to Masons are not strictly Masonic symbols. The cross and the crown symbol was used by many churches of that day. Russell's use of the winged solar-disk originated from his understanding of Malachi 4:2, which denotes a sun with wings, as a symbol that Christ's millennial Kingdom had begun to emerge.
Regarding Sabs claim of both being secret organizations, I don't see any reason for the Masons THEMSELVES to hide that Russell was a Mason. It serves no purpose. Especially since they are willing to release the names of other famous Masons.
http://www.pagrandlodge.org/
http://www.ugle.org.uk/
http://www.irish-freemasons.org/
http://www.valleyofpittsburgh.org/
Page 640,641 of Volume VI of the Studies of Scriptures
"The New Creation "
" This puts in front of us the quite complete problem of orders, societies,
etc., and privileges which possesses New Creation face of these
organizations. Is it suitable that new creatures take part in these
societies?
We answer that if associations of churches are purely religious and trade
union movements of mutual aid are laic, generally ,, there are the others
else who have religious aspects and laic aspects. As we understand, for
example the Freemasons, Odd-Fellows, the Knights of Pythias, etc., carry out
certain rites and certain ceremonies of religious character. Naturally we do
not pursue any hostile campaign against the members of these different
orders, no more than we make it against different sectarian religious
systems. We put on the same foot all the systems which understand ceremonies
and educations with religious character, etc. And we all consider them as
parts of Babylon, whose certain parts are more clean and the others less
clean, but that nevertheless are all full of confusion, error, contrary to
the divine intention such as reveals it the organization of the primitive
Church, and in the instructions that gave to them, by the word and by the
example, the inspired Founder and his twelve apostles.
We advise the New creation to have nothing to do with some of these
societies, clubs, orders, churches with semi-religious character, but " go
out from the middle of them, be separated and not touch what is impure " (2
Corn. 6:17) "
Now answer this: Why would Russell condemn the organization of Masonism if he himself was a mason? It just doesn't add up.