What I expected to happen was...: To break the block under the flower pot to save a little bit of time/hassle, and have a clay pot and an, orange tulip in this case, on the ground.

What actually happened was...: I broke the wooden planks under the pot and instead a clay pot and TWO orange tulips appeared. o.O

Steps to Reproduce: Exactly how I did it:
1. Put a clay pot on top of an acacia planks block.
2. Put an orange tulip in the pot.
3. Break the acacia planks and see TWO orange tulips and one clay pot appear.