There must be something I don't understand about this system.

There must be something I don't understand about this system. My usage says that I have used 163 % of my quotum and that I am going to be charged extra. But, in reality, I have not received even a single result back from the service. So, what am I actually paying for? For the time being, I have cancelled my subscription. I also got the impression that, whenever I re-import my sources files (which I do quite frequently), everything is, quite needlessly, being sent up yet again.