Can WoW Heroes please up date this Bug. Our Guild ( Shadow Kin, On Cairne, US) has waited patiently for you to update this bug. We have completed this instance and still have seen it show us as completed the instance, but only showing 6/7 in FL. A Bizarre bug. Thanks!
Blizzard has changed IDs for some guild raid achievements and their criteria, so we are updating those achievements with new IDs in order to fix this issue. Thanks for reporting it.
P.S. You can see that even armory is giving strange data for guild achievements: http://us.battle.net/wow/en/guild/cairn ... 5079:15087 It says that you have completed Throne of the Four Winds but when you click on the achievement it gives "checked" mark only for Al'akir.