Cannot make double pale doors.

What I expected to happen was...:
I wanted to make a double pale oak door for my house, but...

What actually happened was...:
...It just made two separate pale oak doors. (Only if started by left door.)

Steps to Reproduce:
1. Get a Pale oak door.
2. Place down 2 of them next to each other. (start from left)
3. Voala the bug is done :|