Infinite Door Glitch

I was putting the finishing touches on my house when I placed my wooden door in the wrong space. I confidently broke the door with my axe, surprised to find two door items on my house floor! I tried it again and again, each time ending up with one more door then I began with.

What I expected to happen was...:
When I broke my door, I expected one little item drop.

What actually happened was...:
Two door items appeared on the ground and I collected both when I waled over them.

Steps to Reproduce:
1. Place a door.
2. Break it with an axe (I was using a stone axe)
3. Watch two doors appear!