Does it specify "a move of two?" I wonder if disco zombies (who move three) would trigger from any of the spaces marked with Xs. I would assume so.
It does so. However, as a house rule we always play it that disco dolls may move 3 tiles for reinforcement. Disco dolls are very weak after all since they don't get triggered more often than regular zombies which often enough reach you in two steps. Disco dolls only got the advantage of moving faster around walls.