June had an exit wound and when she fell on the door she left a trace from that exit wound. Its quite visible. I can't see any spatter on the door, but on saying that, I guess there is not a lot we can see in photographs...?
The photos we have posted here don't show the back of the door, Dr. Craig is the one who specifically noted the blood. He said blood was splattered on the rug near Juen's body and the back of the door.
She had 3 exit wounds, the knee, arm and upper back but all 3 bullets were fired while she was in bed and the bullets thus remained in the bed. 2 wounds she could have received while sitting on the bed as she tried to get up or as she was starting to get up. The one between her eyes most likely resulted in the spatter to the door. The door had to be closed enough for the back to be facing her of course. If the door had been wide open then blood would not have been able to get on the back.