After fixing the problem by implementing a 403 error before any redirect(sept 14th) the "not selected" number of pages has dropped by 98% inside my GWT "index status" report. In my particular case the edit comment redirects were all indexed and treated as urls without descriptions because they were blocked by robots.txt.
unblocking them in robots.txt might have also worked, i.e. removing the disallow /wp-admin/
I won't post my solution here because it involved core changes to wordpress and I haven't worked out an equivalent function to do the same just yet.
I strongly suggest you do the following google search - "site:example.com example.com" and check the supplemental index for robots.txt blocked pages.