The hellevator

There are 31 floors in this building, and it can feel like I've stopped at all of them some evenings as the office empties. I read an interview last week with Akbar al Baker, CEO of Qatar Airways, in which he fumed at people pressing the 'up' button when they wanted to go down, and vice versa. If I use the lift here four times a day, this will happen at least once: some dumb fug standing blankly as the doors open at the 11th wanting to up, as we're heading down.
Lifts clearly aren't as simple as we think. Maybe the up/down buttons needs more explanation. Or maybe I'm the dumb fug, and Blankly 11 is zipping up and down, double quick.