Questing bot rage pulling

I am playing on my priest, MS Disc/ OS Shadow, I'm leveling in shadow, and my priest will rage pull (pulling one then another then another mob) He only pulls them and then proceeds to try to keep himself alive. He will attack the mobs until they reach him, but once they reach him, he goes on to the next mob regardless of if he has killed the mobs on him or not.

I have looked through the coding and can read coding but I am not learned enough to know if there is something missing from the coding or what.

Questing bot rage pulling