Guild Wars 2

So…
I wanted to complete the zone of Plains of Ashford and then ran to a problem.
I’ve discovered that I’m missing two hearts. I don’t have a clue where they are, since I’m missing entire missions (not unfilled hearts). I tried looking on YouTube videos, and saw that I don’t have in my map hearts missions.

I need your advice regarding this issue.

I wanted to know if I can Transmutate a back item into the Dragon Wings multiple times? For example, If I get better back item, can I transmutate it to the wings after it got transmutated?
Appreciate the help.

I have an idea who will be great for new players (like me) to adopt the main ideas of this game. I suggest you to add full tutorials. The player will click at a button tutorial and then he will enter a state that is connected to the tutorial. For example, a crafting tutorial. The player enters a small map which includes only trainers and you need (by your commands) to create new items at some trainers.
It will be good for new players to be professionals in GW2. You can add more tutorials such as: skills and traits, atributes, effects and more. I know there are tutorials online, but somtimes they don’t explain well, and I prefer to do it in-game.