No, it doesn't. Because there is none of Nevills blood in the bedroom. You can make up as many excuses as for why that is, but its not going to change anything.
Your scenario has Nevil shot in the bedroom but only bleeding outside the bedroom. It simply doesn't work.
Nevill was shot 4 times in the main bedroom. By a rifle used for shooting rabbits.
The two face shots, blood would build up inside the mouth.
The two torso shots. It would be a long time before blood would get through Nevill's pyjamas and drip onto the floor.
Nevill had exited the main bedroom within 10 seconds of getting his first shot.
Of course his blood will be in the kitchen.