That's what I was thinking also.

Blame a friend (me or whomever) for questioning the professionalism of an org that allows signs like that. "You know? A friend saw these signs the other day and said, "blah-blah-blah." Better yet, an actual patient. If they can't get the sign right, probably don't know which leg needs the operation. Maybe the surgeon is dyslexic. Maybe s/he hasn't mastered writing orders.