I guess everyone has different experiences but I use the same macro and have no issues with it. I do use a Naga mouse don't know if that makes a difference. I just mouse over party bar and I click 1 on the mouse. I don't mouse over the battlefield as I find that it's not that effective for me as mousing over the party bar. I will leave fairy near melee and tank if I'm moving a lot and most of the time the fairy can take care of it, if i'm out of position.