1. Story display for each stair:
On the Preview and Positioning tab of the Stair Selections Settings box there is a drop-down button where you choose which story(s) the stair should show on; same as for library objects. The bottom stair would want to show on its own story and One Story Up so choose "One Story Up". Set the upper stair appropriately.
2. What to show on these other stories: On the Parameters tab >2D symbol Type>Story Sensitive click On. Now you will have a the "2D above Home Story" tab available.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"