While walking in the crown pavillion I just realize how much I want the Living Story achievement to pop up automatically.
My suggestion is that achievement progression will pop up in the right hand corner automatically when you progress through the achievement.
Example, let say that you killed a grawl. The grawl slayer achievement progression will pop up automatically to notify you how much percentage are there left. Now let say that there is already the maximum amount of automatic achievement progression. In this case, it will remove the oldest achievement progression and fit in a new achievement progression system. If you finished your grawl slayer achievement, the achievement will never pop up automatically again.
If you locked the grawl slayer achievement onto the achievement progression bar, it will never go away until you remove it personally.
Why?
Current system is clunky. ANet should fix this because it will tell the players that there is something to achieve thus they will stay more and Anet gets money for more players staying.
5x Warrior, 5x Ranger, 4x Elementalist, 4x Engineer,
4x Necromancer, 3x Mesmer, 4x Guardian, 4x Thief, 4 Revenant