Cannot un-bury the joint

[Gene Davis]

Here is the V10 file.

There is another issue I am having that has me stumped.

I have not done stacked stairs before. I got a set of stairs up from the basement to the main floor, which has the staircase area called "open below" in plan.

The staircase plan for the second is also specified as "open below."

I have the stairs built, but everytime I try to place them in the staircase, they fall onto the stairs below, instead of staying at the correct elevation.

I have watched and re-watched all the training vids I have re stairs, and cannot find the way. What's up?