From your library receipts, it looks like you have at some point had an older version of MacKeeper (not MacKeeper 2012, the current version) installed.
A lot of folks have complained that MacKeeper is very hard to remove, and that if you try to clone or archive and install, the errant bits of MacKeeper will still be there. I've found a Web page that talks about eradicating older versions of MacKeeper here:
http://applehelpwriter.wordpress.com/2011/09/21/how-to-uninstall-mackeeper-malware/comment-page-2/
