The Blue Baron wrote:
In game 201206 on turn 7 I was hit directly from behind with no deflection. One of my chits was an engine hit and the damage was actually applied to my engine. I know the damage should have hit my tail since I was hit from behind with no deflection.

This game wasn't one with a tail gunner firing on you was it? If so they fire with deflection even if behind you unless they are flying directly away from you.