Events-Blizzard Promotions many achievements/items should be marked unoptainable: 2008 Spirit of Competition Event (Spirit of Competition and Competitor's Tabard); 2008 Worldwide Invitational (Tyrael's Hilt); Arena Tournament (Murkimus the Gladiator); Diablo and WoW collector editions; some Expansion Pre-Launch Events rewards; Gates of Ahn'Qiraj (Scarab Lord and Veteran of the Shifting Sands); Korea World Event (Onyx Panther); WoW's Anniversarys (4th; 5th).

Thank you for the report. This was fixed in git release 432ba48 on June 2nd. If you grab the version from git it will have it fix. Release doesn't have the fix yet.