Actually, I believe Boris is correct, based on what I have read. As I understand it, FDR added the two additional commas without challenge around the same time he was packing the Supreme Court with socialists.
That the commas were kept is no surprise based on the general trends of media in the 20th century. However, I believe the original 2A had only one comma.
IMHO, FDR was allowed to "amend" the Constitution illegally and it should be challenged.
I think I stand corrected. I viewed the original BOR document in which the Second Amendment was actually listed as Article the fourth, and the commas appear to be there.
An internet legend, apparently.