Hi, i think even ACJC personnel won’t be able to shed any light on your question, unfortunately, since they also will not know what could be the final outcome. Moreover, with the uncertainties resulting from the merged JCs, there could well have been some changes to the ball game.
One thing i am very sure of is that the selection process does not go by the priority of your selections. It goes by the L1R5 score just like what they do for PSLE T-score.
That means if the COP is 10 and you apply with L1R5 10 but put your desired school as the 3rd choice for example, you will still beat another applicant who put it as a 1st choice with L1R5 11 unless you have already been allocated the school you put down as your 1st or 2nd choice.
It follows the logic: the one who has a more favourable L1R5 takes precedence until the last vacancy is filled. If that last place is taken by someone with L1R5 9, then by the time it comes to your turn, your 4th option will be considered instead, assuming there is also no more vacancy for your 1st and 2nd choices.
Hope that helps?