I got a C because of a TYPO!!!!!!

So, I turned in a paper last week, I was confident I'd be getting an A on it, I knew the material solid. I get my paper back today, I get a C and on my paper, there are alot of red markings, saying that I should of put slashes, in my kind of class, you have to split up the root words etc, well here's the funny part, the paper told me NOT to, I find out that that paper was printed out wrong and my grade stands. I am REALLY PO'd because I got all of the answers correct, the only thing that was apparently wrong was slashes I didnt put in because the paper told me not? WTF. I'm not a happy camper but I spoke to professer etc and theres nothing to be done about it. mmk whatever....