Kingdoms arcane Stones color

I don’t understand why purple/brown arcane stones and some other only have 1 kingdom associated with it while other like red/yellow got as much as 3 kingdoms…

Bumpimg this

I can say the Purple/ Brown traitstones will be getting another kingdom later this year.

Thanks for your reply @Nimhain. But how come red/yellow has 3 kingdoms associated with it in the first place?

The arcane stone/kingdom distribution is a bit off no?