If you check the Steamworks title Dogfighter, it can plainly be noted there is a duplicate nonexistant achievement that is preventing anyone from having an S-Rank.
proudlarry's forum posts
My achievement stats have not updated in over one month. This site greatly confuses me. Perhaps I am an idiot. Is there a way to MANUALLY update my steam stats? I contacted "Support" aproximately one week ago and no response. Help would be appreciated. Flaming the living crap out of me would also be appreciated provided you are actually funny. HHHHEEEEEELLLP :D