I agree with your doubts regarding all the blood spatters. So, let me summarize my doubts about this once more even Im not a forensic expert
A - Blood stains on the sofa
1. The photos show no sofa under the part of the stairs without wall. So where the sofa was located if there were blood stains on it?
2. There were quite a lot of blood spatter on the sofa - spread over a fairly wide range.
3. If this blood dropped down on the sofa when OP carried Reeva downstairs, her head would have hung over the railing. But directly before and after the area with stair rail were walls
against which her head then would be beaten.
B Blood stains on the stairs
1. If the blood of Reeva's head wound dropped down (on the sofa), as OP carried Reeva downstairs, then her head must have been on
the left side of the stairs (view from bottom of the stairs).
2. The photo of the stairs shows only occasional splashes of blood
on the lower stair treads - and all these blood spatters are
on the right side of the stair treads (view from the bottom of the stairs). There is not a single spot of blood on the right side of the stairs.
3. There is not a single spot of blood on the wall at the bottom region of the stairs.
C Blood stains on the wall
1. Its unknown what area show the blood spatter on the wall.
2. But if you compare the photo of the stairs and the photo of the blood spatter on the wall, the blood spatter on the wall could be
at the top of the staircase area. Both photos show a dark shadow - the stairs photo right above, the wall photo on the right side.
Because the stairs were photographed from below, it may be that these blood stains are not visible on the stairs photo because this photo doesnt show the top of the wall.
3. The blood spatter on the wall are (for me) to widely dispersed than they are incurred when OP carried Reeva downstairs. Her body was weighty. A man with two prosthetic legs and wearing an unconscious body in his arms is likely to have difficulty keeping balance while going down the stairs. So, even if OP swayed when he carried Reeva downstairs he wouldn't have wavered as strong as her head dangled back and forth so strong that there were this kind of widely scattered blood spatters on the wall, because then OP certainly would lost his balance.
Because of all that, I don't believe anything OP or his DT want make us believe about what happened.
In my opinion there was a dispute and fight outside the bedroom.
- They weren't in bed - not for a second - because both were dressed (as paramedic said).
- Reeva wasn't shot in the toilet but previously somewhere else in the house.
- Maybe then she dragged herself with her last strength in the toilet but she no longer had the strength to lock the door.
- Thus, OP could easily open the door and saw Reeva was
already dead on the floor.
- Then he called Stander and his family members. Some of them came to the house within a few minutes and together they invented the story of the burglar to save Oscar's neck.
- They prepared the crime scene suitable to their story - but made a lot of mistakes.
- And only just before someone phoned paramedics OP carried Reeva downstairs. Maybe they even told him what he should do, so it became blood spatters on the wall downstairs to fit their story.