The answer to whether or not you need two labels depends upon what you have put on your label to begin with.
Your label must have:
Name of product - what is it
Type or scent
Weight
Your full business name and address
List of ingredients
Directions
Cautions if your product can cause slippery tubs, keep out of the reach of children, and if it is shaped like a food product it is a good idea to state it is not edible.
If all this fits on your label you are fine, if not you would need another for more space.