Steps to reproduce:
Place a double door
Enable debug screen
Observe the upper half doors showing "hinge:left" resp. "hinge:right"
Lower half doors report both "hinge:left"
Environment
Java 7
Steps to reproduce:
Place a double door
Enable debug screen
Observe the upper half doors showing "hinge:left" resp. "hinge:right"
Lower half doors report both "hinge:left"
Java 7
Confirmed.