Not sure if this is intentional or a bug but during a sky trail battle, you can only use 1 of each buff each battle. It only shows 1 buff even if you have 5 buffs, which is the maximum you can have. If this is not a bug, why does it have a cooldown period then?

Now this early in sky trail, this will not be a problem. But we might need to use more than 1 buff for each battle in the higher levels.