Picking up extra items!!!

When I pick up ground items they duplicate!!! I first noticed I had an extra crafting table while mining, but I thought it was just my memory. Later, I found I had three! I did some tests and got eight plus three I placed down. I then did the same with a furnace, raw chicken (The Candy), and my Iron (Black) Sword! They duplicated!?! It does not happen all the time, But it still does. I apologize for using a resource pack during this. -Fireguy2464
NOTE Also, I forgot to stop the auto-play in the background. Enjoy Caramel Dancen!
(VIDEO: https://drive.google.com/file/d/0B_CcPMhjX0MrZmJlS2pZakxjbms/view?usp=sharing)