new doors dropping oak doors when block beneath is broken

new doors dropping oak doors when block beneath is broken

i had just build my new house with the new spruce wood doors and then desided to replace the floor when i broke the block beneath the door i expected that there would drop a spruce door

What actually happended was that there dropped a oak door

Steps
1. place Spruce-, Birch-, jungle-, acacia- og dark oak door
2. break block beneath