Please see this screenshot:
http://carlbolduc.tumblr.com/post/2902432656/petit-probleme-de-categorie-avec-emacs-org-mode

From what I know, I should see the name of the org file on the left side of "TODO prendre mon synthroïde". 

Instead, I see "Ann", which is a category that is used in another section of the org file. What is going on here?