- You used a triggered order for them to Move or Attack/Move to a Point? (or generally any order would have the same effect) If the answer is yes, then they are simply obeying to the order you gave. So until they complete the order they have no will of their own, meaning they will ONLY follow that order.
- The solution to that would be triggering their actions to cast a spell. If I was correct, reply so I (or somebody else, I don't have much free time) can provide you with the trigger.