Bamber shot June & Nevill from Junes side of the bed = 9 casings.
Sheila was shot on Nevill's side of the bed = 2 casings.
You're not answering my question, either because you don't understand what I am asking you or you know what I am asking you and you don't want to admit that you could be wrong.
If, as you and Cambridgecutie claim, we must treat the SOC diagram as the written Gospel, then your scenario is wrong. Your scenario is wrong anyway, as it is contradicted by the blood and pathological evidence.
Of course, you could concede that we cannot rely on the recorded position of the cartridge cases and bullets. They were moved.