Picture one is a third person view of picture two.
Picture two is me inside a single fence.
Picture three is me inside two fences.

What I expected to happen was...:
The fence would not place when I attempted to "jump-place" it.

What actually happened was...:
The fence did place and my character was inside of it.. Afterwards I could also place another fence block on top of the first one, also with my character inside of it.

Steps to Reproduce:
1. Stand on a solid block and look down at the ground.
2. Jump-place a fence post on the block you are looking at.
3. Place another fence post on top of the other