Go to edit your profile then click into the notifications tab. On that page, check the box next to the "Bookmarks" option to disable the notifications for the bookmarks. Once that's done, reload the page and then re-check the box. After the bookmark notifications have been re-enabled, see if that corrects the count.
This helped me back then with a similar problem regarding bookmarks. I asume this will work for you too jt33396.