Guild Wars 2

I finished a jumping puzzle recently, but I did not get the achievement for completing it. I even checked the list of Jumping Puzzle Achievements, and it also doesnt say I have it done. (The puzzle I did was LoreClaw Expanse)

Are you sure you reached the final chest, and not the intermediate one?

http://wiki.guildwars2.com/wiki/Loreclaw_Expanse_%28jumping_puzzle%29#Walkthrough

Good luck.