by the way, your manual says this in the entity section of the script page, where the spawnat command is located
Now I got what you mean. Yeah, it's definitely a typo, my bad. Anyway, it works for every case, first it goes with X, then Y, and then Z (which is a floor height, started by 0 as Floor 1). There was a times when editor was including only one floor (others was nothing but for decorative purposes), so it was enough to write X and Y down. That's why this example was left in old manual.