4 club page total manager score is 17100 but 6740 points in the world rank seems to be the reason
Hello Çağlar & welcome to the Global forum.
About the World ranking , I have to inform you that only 1 out of your 4 Club Slots matters for your World ranking.
But it's always chosen automatically to be the one with the highest amount of Manager points. And this is the only fair thing to do, since there are many managers on OSM that use only one Slot and try to score on the World ranking.