This is an old bug, but not many people know it. There is no Z axis for things you need to stand near to do crafting...
i.e. Soulforge's, Forges, Anvil's, and the like.
What does this mean? Well your crafting room just got bigger!
example: In my keep, the first main room you enter is my crafting room, but I placed the soulforge, forges and anvils on the roof. I am able to smith and imbue on the first floor because the code does not mention Z axis for them. So I have a ton of chests and no forge or soul forge in my crafting room. Gives you a lot of room to store all your supplies for all trade skills within arms reach because you dont need to work around those big bulky things.
Now let me in :p