---> It should be like this :

routes:
     post:
      2013:
        10:
          12:
            my-first-post:
            my-second-post:
            my-third-post:
            my-forth-post:
              
---> What i have for real :

routes:
    post:
      2014-12-01:
        my-first-post:
        my-second-post:
        my-third-post:
        my-forth-post: