No need to apologise mate your help is greatly appreciated. It is a bit difficult to understand your new diagram without the guitar here now but I think what you are saying is I just need to add a wire on each side to get both pickups working in the middle position.
I will see if I can get him to drop the guitar back over in the next couple of days and try to fix it. I will take a picture of the wiring if he does bring it back because I want to do it correctly.
It will be helpful for me to understand this for the future because I'll probably build a seven string at some stage
Cheers,
Alkay