Hi developers

This is K. Kaushik Reddy. I had been assigned with the measuring of the ROC AUC issue to patch for, I had this ROC wikipage to help me with the concept of working. Since, I'm a in my beginner level, I need time to understand. The problem is to find out why the algorithm is showing huge values at times. I need help regarding the understanding of where the in the functions had gone wrong and what could be done?
I hope I made my question clear.