WOW: Level Archaeology Faster with Troll Bug

Currently there is a bug I noticed with troll archaeology which will help with leveling Archaeology quickly. As we all know recently they buffed archaeology which gives 3x (15 points) the level up on rares found. So far Troll only has 1 rare which is the epic weapon  Zin'rokh, Destroyer of Worlds. I've noticed that when you get to Zandalari Voodoo Doll which is a common item it also gives you 15 points and only cost you 27 fragments. Just stay in Eastern Kingdoms and you will level archaeology much quicker.

The one that is in bold is the one that also gives you 15 points.Also listed is how many fragments are needed for each item to give you an idea of how fast troll takes to solve.

Common tier Troll items: 14 common items
Zandalari Voodoo Doll - 27 fragments
Fetish of Hir'eek - 30 fragments
Eerie Hakkari Idol - 35 fragments
Lizard Foot Charm - 32 fragments
Jade Asp with Ruby Eyes - 35 fragments
Feathered Gold Earring - 34 fragments
Cinnabar Bijou - 35 fragments
Atal'ai Scepter - 35 fragments
Gahz'rilla Figurine - 35 fragments
Skull-Shaped Planter - 35 fragments
Bracelet of Jade and Coins - 35 fragments
Drakkari Sacrificial Knife - 35 fragments
Tooth with Gold Filling - 35 fragments
Fine Bloodscalp Dinnerware - 32 fragments

Rare tier Troll items: 1 rare
Zin'rokh, Destroyer of Worlds - 150 fragments