Guild Wars 2

I have just finished the 2nd zone of world 1, and I have 4/5 shops found. There are 4 shops in zone 2. The first and the second are okay, but the third “before poison water” is just a trap, it didn’t count for me. The last one, under the ground, is a trap too. We die without any reason…and it didn’t count for my success.
There are 6 shops in zone 3, if they all count for the success, it’s not sure, we obtain 4+6=10 shops.
So, there is a problem ^^

yes we wiped a first time…so that’s why it didn’t work even if the event was here. Thank you for details !

What we have to do exactly after ? We have to activate something or just drop the cannon on the ship ?
Yesterday we success to kill the boss in 15min, we say the event with the timer, we tried to charge the azura cannon on the ship with the Horrik’s cannon, but the only possible action was to drop it. Is it the thing we have to do or there is something to activate ?