Confusing listing

Letters

I would like to know as a parent why there are separate student selection lists from the Department of Higher Education Research Science and Technology (DHERST) and the University of PNG.
I understand that the selection of grade 12 students to the university is done by DHERST.
My son was selected by the system at DHERST this year, but I just learnt that there was a different list manually done by UPNG.
This needs to be explained publicly so everyone understands.

Concerned Parent