I've found out more information about what happens with secondary school final exams and applying to university in Malawi. The system is difficult and extremely long.
The secondary school government exams are written in July. The results are usually not ready until late September or early October. Prospective post-secondary students must WAIT until MARCH of next year to write entrance exams. Then they wait some more. IF they are chosen, they likely won't get to actually begin until the FOLLOWING September.
These students essentially must put their lives on hold and try to hang on for up to TWO YEARS before they can hope to begin their post-secondary education. I'm sure that many of these prospective students find themselves unable to go to university by that time.