Grouped cavalry movement

Is there a way to get a control group of cavalry to not move like a gaggle of retarded monkeys? If I use Attack Move or even patrol, instead of them each moving on that direction they re-form their group first, often times meaning the closest unit to what I want them to attack goes the WRONG way because he's supposed to be at the BACK, not up front. That's Chuck's spot, but Chuck is at the back so everyone has to wait to reshuffle the group before they attack.