Windows Vista Windows 7 student

Hi I'm not sure if this is the right place to ask this question but I need a bit of help. Basically I have bought windows 7 through a separate company that offers windows 7 to University students for 39.99. The problem begins with the fact that I have "bought" 3 different copies although I am only allowed 1. I was wondering if Microsoft would be able to find out that I have sold the extra 2 copies i don't need since the company will not take back the software. Any help will be appreciated thanks!

Oh man This shouldn't be in the vista forum.