Yes, that is correct.
After scores determine a schools pass mark, The order on the CAF then comes into play.
It doesn't matter which school the test is sat in as the schools are all part of a consotium and therefore all sit the same test and the results are sent to the LEA who then allocate according to the above two criteria.
Thanks for the advice, what was concerning me is the statement written on the registraion details. It is written as follows,
"please tick next to the consortium grammar school that you put highest on your CAF
." In my case I have not decided on the order of CAF preferences yet but have decided to take the test in St Bernard.