This is because "Margaret Sanger Microfilm" is surrounded with and tags, which makes the XSLT recognize it as a journal title, and thus turns it into a hyperlink.
Possible solutions:
write XSL to ignore Margaret Sanger Microfilm titles.
remove from "Margaret Sanger Microfilm" or find analagous tags to replace these
find a way to search for documents containing "Margaret Sanger Microfilm" so that the search link works.
This is because "Margaret Sanger Microfilm" is surrounded with and tags, which makes the XSLT recognize it as a journal title, and thus turns it into a hyperlink.
Possible solutions: