Yeah, I noticed this too. You won't really notice what a homing attack is until you start leveling up Juliet's "Homing" stat. When you attack with pom poms, you'll slightly zip over to the closest zombie, that's all it is. It's automatic, and again, it becomes very apparent when you level it up. It doesn't really home on when you first get it, I thought there was a move I was missing so I checked the list...didn't see anything regarding "homing".