Ok,first of all,Tal,edit you're post.
Second,the Bohrok returned to the nests,maybe Kopaka froze em a while back,when he was an Olda.But the weird thing is....the bohrok has Korahk Kal's symbol on the head plate.
D-tector,please do not direct link you're avatar and don't leech off BZP with that banner.....
Edit: Here's a statement of a fellow BZPer who agrred with my theory(sort of)
|Those Kohrak were frozen by Kopaka olda some time ago during the Bohrok War. Seeing as they're in the ice region, they still haven't thawed.|