After a disappointing loss to lesser ranked Outeniqua, Paarl Gym slipped five places down the rankings, while an unseeded team influenced Nelspruit's position.
The positional changes in the rankings start from the fourth spot, as the top three, consisting of Grey Bloem, Monument and HTS Middelburg, remain the same.
The biggest shift in the rankings sees Paarl Gym slip five places from 12th to 17th after being humbled by Outeniqua in Paarl.
For a school who was not ranked two weeks ago, Oakdale continued their surge up the table, moving from 17th to 15th after a resounding 73-5 victory over Oudtshoorn.
Garsfontein and EG Jansen swap places in that fourth and fifth slots, while Waterkloof cemented themselves as the sixth seed. Glenwood's 19-39 loss to Menlopark cost them two places, from seventh to ninth, which elevated Paarl Boys' and Paul Roos one place above their previous rankings.
After their respective wins over the weekend, Grey PE, Wynberg and Maritzburg all jump one spot while Nelspruit sunk from 16th to 18th after they were beaten by the unseeded Hoërskool Middelburg.
FNB Top 20 schools rankings
1. Grey College
3. HTS Middelburg
5. EG Jansen
7. Paarl Boys'
8. Paul Roos
12. Grey High
17. Paarl Gym
Meanwhile over at SASchoolSports.co.za, Grey Bloem also sit at the summit of the rankings, closely followed by Garsfontein, Paul Roos, Monument and Paarl Boys', who complete the top five.
Wynberg occupies 13th spot on both lists, after they continued their solid season with a 20-19 victory over rivals Bishops. Affies' indifferent season leaves them out of the Top 20 all together, with Kearsney, Oakdale and Tygerberg all suffering the same fate. They are replaced by Bishops (12th), Dale College (14th), Michaelhouse (15th) and Helpmekaar (18th).
SA School Sports Top 20 rankings
1. Grey College
3. Paul Roos
5. Paarl Boys'
7. EG Jansen
8. Grey High
9. HTS Middelburg
11. Paarl Gym
14. Dale College
Photo: Carl Fourie/Gallo Images