Yeah they totally could. It's just a long-standing bug that nobody has ever had the motivation to fix as far as I can tell. It's been a problem since '99, not even joking.
I actually like how it affects positioning and dodging. If your opponent only has rockets for whatever reason you can essentially shut him down entirely by positioning yourself at some stairs. It's pretty annoying though when it's only one stair/elevation (like mh on cpm15).