Poop...Stay in the box!!

Cody is my Miniature Pinscher Pooch. He is amazing and is fully litter box trained both #1 and #2. I am so proud of him that every time he finishes he HAS to run and tell me what he has done. He gets me to follow him to his box and starts barking. I give him good treats for it BUT..... Recently he has been bringing the poops out to the middle of my hallway. or spreading it around near his box. Why is he doing this?? Is he trying to eat it or show it off? How do I correct this?
Help [:o]