Harpo:
Just looked at the info provided. Here are my first-blush observations.
The structure is indeed 36' tall at the West side of the building only. From there, the roof height slopes down toward the opposing side, on the East side of the building, creating what is known as a shed roof. The East side is 26'-5" in height.
From the table provided in the documents, there is only 12,281 s.f. on the second floor. The ground floor is 50,000 s.f. and with the second floor, it will total 62,281 s.f.
FWIW, whenever possible, multi story structures offer a much more cost effective structure than single story buildings. I suspect that the 2nd floor will house the office space (6,962 s.f.) which accounts for more than half the square footage on the 2nd level.