During a regular battle you should only have to hit the A/X button twice - for the auto-battle command and then for your enemy selection. Rinse and repeat for the rest of the battle.
But for some reason, I find myself hitting the A/X button several more times than I have to. Even when my attacks are already underway I find myself tapping the A/X button as if it does anything.
Does anyone else do this? Maybe it's just out of habit from the different games I've played over the years.