Guild Wars 2

Today’s update notes:

SUPER ADVENTURE BOX: BACK TO SCHOOL

Fixed a bug that prevented the rare tradable Super Hammer Skin from dropping in zone completion chests.
Fixed a bug that prevented the Tiptoe achievement from being awarded properly.
Fixed a bug that prevented the Baby’s Second Super Adventure achievement from being completed.
Added a warning message before entering the Super Adventure Box from Rata Sum: purchased buffs and all other types of buffs will be lost upon entering Super Adventure Box.
Fixed a bug that prevented the Tough Customer achievement from being awarded.
Fixed a bug that prevented players from being able to loot the chests from World 2-3 in both Normal Mode and Tribulation Mode on the same day.
Fixed a bug that prevented players who had completed World 1’s Infantile Mode in April from accessing World 2’s Infantile Mode without completing World 1-3 again.

https://forum-en.gw2archive.eu/forum/info/updates/Game-Update-Notes-September-3-2013/first#post2780744

Fixed a bug that prevented the Tough Customer achievement from being awarded.

This seams still be bugged for World 1.

You missed one then. Did you go to the one for the elite skill?