I'm trying to construct an up/down staircase two levels below my main floor, but for some reason my mason isn't doing it. I have stone on all floors which is not forbidden or anything, I have up/down stairs on the floor above it, and I have a mason idling around. Why isn't he building the stairs?
I also noticed that when I built the up/down stairs that are one level down, it took a long time for my mason to start. I didn't notice anything change when he finally started, so I would like to know why it's taking so long.