Voidstones Not Being Taken From KI

Ok, something is preventing my voidstones from being used from KI. I have used thousands of voidstones, few campaigns ago I used over 2k, and have never had a problem.

So this month I have tried the following:

Talking to NPC with no stones on hand, set to KI - doesn't work.
Get 1 stone from NPC, set to KI, uses 1 stone then says I'm empty.
Get 6 stones from NPC, set to KI, uses 6, then says I'm empty.
Talk to NPC and choose KI, then inventory, then back to KI - doesn't work.

I only have 100 stones but I want to burn them faster than 6 at a time. I have never had this problem before. I have all VW completed and all KI's. I am not a moron, but am I missing something?

Yes, terminology at the NPC is a bit misleading. KI refers to the 6 limit temporary KIs.

Stock is what you want.

Yeah, what you said is pretty confusing but I think I know what your issue is. You have to have at least one stone in your KI list as well as choosing select from stocks.

Without 1 stone in your KI list, you can't interact with the pop spot, and you don't get items from chest, etc...

So, pick up 1 stone, switch to "from stock" and that 1 stone you picked up will be used last, but it has to be in your KI inventory.