Guild Wars 2

I have been playing Guild wars 2 now for some time and am getting very frustrated with the AI leveling. I have played as a warrior, ranger and elementalist at 1-9 early levels. The problem with game is that say you are to save the children at the orphanage quest and it is set for level 6. You manage to get your player up to 5 1/2 level and then you get some upgrade like a vest or pants upgrade. This then changes the orphanage quest from level 6 to level 8. Now you are still at a 5 1/2 level and you can’t possibly hope to win the orphanage quest, while as before you could have if the level for the quest would have remained at level 6.
What the hell is wrong with the leveling AI in this game? The programmers for this game need to correct this problem or else other players who start this game will throw up their hands in total frustration.

I was playing the game just fine and then it started freezing. Then later I got disconnected 4 times from the server? What’s wrong ? Have the servers been hacked?

thank you all for your replies. I guess the storyline quests are just some kind of guide.

I have played as a warrior and a ranger to level 7 and followed the quest storyline. With both professions I reached level 7 and then I ran into this quest called a vision from the past. The problem is I am only at level 7 and the bandits who attack me are at level 11. How can I possibly complete that quest when they kill me off almost instantly. Isn’t this game suppose the folow a chain quest at the level you are in? What should I do?