So apparently only 2 people were interviewed for year 8 - going to year 9.
1 got in and the another is unknown.
Why is there so little people getting?
From Years 7 to 10, selective schools are less inclined to accept a larger number of students (i.e. less demand essentially) because student numbers are generally at maximum capacity in junior years.
Entry into Year 8, 9 and 10 is usually confined to under 5 students (for each grade) for most selective schools.
Then you can argue that for Entry into Year 11 (applications from Year 10 students), most selective schools are inclined to accept more students because they are assuming students will leave their school or simply, they are not at maximum capacity for the cohort that will be heading towards Years 11 and 12.
For entry into Year 11, selective schools tend to accept more students (e.g. 10, 15, 20, etc.)