Guild Wars 2

During my fashion collector hunt I find two sets of armor “bugged”:

1- I can’t unlock the skin of the head piece for the Rogue armor set because there is not the option “unlock skin” in the menù after right click… and then, I can’t find a such piece as loot drop but just by karma vendor

2- Head piece and shoulder piece of the Studded armor set don’t drop anymore as loot, the only way to obtain them is now by personal story

All others Loot armors sets are working perfectly, and I had no problems with light/heavy Looot armor sets.

1 – agreed. Even if i buy it on wvw and apply on gear there isn’t count as unlock

UPD:
at last, found a merchant where i can buy and unlock this skin:
http://wiki.guildwars2.com/wiki/Crusader_Patrick
but it impossible in low-lvl areas (1-25 lvl)

Yes, it works, thanks!
But still bugged for others merchants, like the karma vendor Lionguard Micah near Delanian Waypoint in the Kessex Hills…

Supple Leather Mask Skin (Rogue Mask) bought from the WvW vendor also doesn’t unlock, but fortunately there are plenty of Karma merchants that sell it.

Warden Shoes Skin (Stalker Boots) bought from the WvW vendor also doesn’t unlock. You can buy the Warhound Boots from Kennelmaster Warsnout in Iron Marches and it will unlock though.

Yes, it’s true… and for a more generic discussion about medium armor: Marauder set and Stalwart set can be obtained only by personal story, but if wiki is correct, even in this way you can’t complete the Marauder set.
As always, Dulfy have done a great work for a more general status:

http://dulfy.net/2014/04/16/gw2-wardrobe-armor-guide/