Keys Wont Stack

I have a bunch of keys from before the last major update that won't stack with new ones. I have tried to use the market to fix this and it won't work, these stacks are not from quests, only from the key guardians. Help please

 

That's just kind of how they are, maybe try putting them into and then taking them out of the guild bank? but sometimes keys are just like that and you have to deal with it