First of congratulations for passing the Mayfield test.
As for your query: I am not an expert but this is what I gathered from their oversubscription criteria and the information meeting that took place on June 21st this year - the school prefers local candidates so they will take in candidates from inner catchment first be it from Kent test or Mayfield. They would give preference to candidate who have passed Kent test first and then Mayfield test which puts you in 2nd order of preference within the catchment. But historically the school was undersubscribed in 2014. In 2015 school took 134 from Kent test and 15 from Mayfield test.
In 2016: the school increased its Pan no from 145 to accommodate another 26 candidates. They did take in candidates from the outer or the last catchment ( I am not sure how many) implying that they accepted everyone in inner catchment area. Please note that is not first hand info and I have taken it from other people who got it through from the school or KCC.
You can always email the school if you want the data or if you are attending any open events you can discuss it with the school.