Guild Wars 2

As title says the achievment is bugged for me. I had two shops left from the last time and wanted to complete it. Shop number 6 went without problems but shop number 11 at the end of Zone 3 dont count went in several times.
Also tired not to take the checkpoint at boss first but nothing helped.
In the picture u can see that i´m there and nothing happend.

I really looked forward to craft the pre for this waepon but why do i need scribe 300 for it.
I don´t know how much money you need for this and i´m glad if you would tell me
but all i know after some research is that ppl say it costs about 400g and need guild stuff unlocked.
And the sheets are accountbound, so 1 scribe for a guild to get everything will not work.
Please tell me what awaits me in T2 + T3 so i know if i´m not far better with farming gold and buy the pre.

P.S I dont mind the mats farm for spiritwood and deldrimor so exclude it pls.