Some strange behavior of git

Hello,
we use git in our project.
What can be cause for further confusing behavior?

     git@ip5server:~$ git status
     On branch master
     Untracked files:
       (use "git add <file>..." to include in what will be committed)

         app/addons/arliteks/

     nothing added to commit but untracked files present (use "git add" 
to track)
     git@ip5server:~$ git clean -dn
     Would remove app/addons/arliteks/
     Would remove design/
     Would remove js/
     Would remove var/langs/en/

Why I don't see all 4 directories in first command?