(2) each room score 2x where x is the floor. The ground floor counts as 0 since we start the game on this floor , so there are two rooms at this floor : 0+0. Then on the first floor there are two rooms , they each score 2 Popularity points, so 0+0+2+2.
Waiting room and operating room are not considered as rooms since they are described as specialized modules instead , so they score 0, , they have other advantages all along the game if the player plays well
has this been corrected in the final rulebook? the file here on bgg says to score 2,4,6 and 8 points according to the floor (although the example works as you explained).