Ridiculous system that fails students

The weighting of our results is absolutely ridiculous!! I'm so annoyed, I'm a distance student and recently wrote my supplementary exams of my Higher Certificate in Business Management. They initially divide all your marks into a certain percentage in order to get an overall module mark. However, when you write a SUPP they divide all your marks AGAIN into 50%. How do you divide marks twice??? Now I failed all my modules and have to repeat!!! These people try anything to get us to repeat and waste money! They don't care about us passing or not!