As Jacky said, they are duplicates, but ... they're not exactly duplicates. The only footnote that is a good citation is #6. All the rest of the footnotes are only links, but the duplicates with the asterisks below do have the good citations.
I recommend that you replace the footnote citations with the ones that you have below the footnotes and then remove the duplicates from below. Also, after the <references /> tag, you can skip a line, then put "See also:" on the next line. After that, you can leave the asterisked source citations for any that were not already footnoted in support of a statement in the biography.
Nice job on that profile!