I think you’ll find the profiling test pool may have been widened too far for the most recent squads (600-700 deep) and hence a couple of square pegs trying to fit into a round hole. If anything, the process will be reopened again next year to get more applicants to add to the pool of those who have already applied. The aim would be to get more people through to the interview stage who fit into the parameters of the psych test for suitability for the job, rather than widen the parameters and take less suitable people.
Don’t read into how many taken through to recent PAT1. They have to release people to run the test so it’s easier to run a larger group and have extra in the bank for future squads rather than not run enough to top up a squad.