Thanks all. I appreciate it. I figured it out. It was unclear to me that I had to draw both stairs on the same drawing level (or maybe I don't, but that is how I figured it out). Originally I drew the landing first, at a fixed height below grade. Then while on the basement level, I drew the first stair from the basement level floor to the landing. Then I switched to the first level (so I could see where the top of the stair should end) and drew the second stair from the landing to the first level floor level. It would never "sync up" in that scenario.
As soon as I drew everything while on the basement level everything worked.