Anyone knows Geylang MGS COP?

Hello,

I have a question on Sec1 submit.

I've read below MOE link.
https://www.moe.gov.sg/microsites/psle-fsbb/posting-to-secondary-school/faqs.html
I can see comment below.
Students are first ranked by academic merit (T-score Aggregate).
The first student to be considered has the highest T-score Aggregate and will automatically be posted to the school that is their first choice.
The next student is then considered and school places vacancies in secondary schools are filled up one by one.

Does it mean below case?
E.g. My child is 1500th ranked student
After posting the 1499th student to a school considering 1st to 6th choice,
then the computer will look at my child(1500)'s 1st choice whether school still has vacancy?
and check 2nd choice ...until 6th choice?
After that the computer will look at 1501th Student posting?