Hello,
Know you asked this a while ago, but if you're using this asset pack in Unity, the solution is to change the pivot point of the watering can sprite - i.e. open up Sprite Editor, go to the watering can sprites in question, and move the pivot point so it is higher up on the guy's body, so it positions correctly relative to the other sprites for the guy.
I'm sure other game engines have similar mechanisms for doing this.