Online job hunting

I don't know if its just me or the search engines I'm using, but its defintley interesting. I am signed up for eRecruiting through the University of Delaware and CareerBuilder after seeing their commercials a million times during the Super Bowl. LOL one successful commercial. I have only done a small amount of job searching through eRecruiting. However, when I did look I kept finding odd jobs that didn't fit. Like when I searched for children and research or research and psychology I would get pharmaceutical or computer programmer jobs. How does this fit??? This is also happening with CareerBuilder. I signed up last night in the middle of the Super Bowl. Yea, I'm a nerd, but anyways. I signed up last night and this morning I have already gotten two emails from two companies totally unrelated to anything in my field at all. I have a feeling its because I selected some option for companies outside of my field or companies that hire other people, like head hunters or temp agencies or something. I think after I do some more data entry I'm going to look around my preferences and see if I can figure out what I did sign up for so that my email box will not be stuffed with weird jobs that I would never apply for. LOL could you imagine me working at a company that deals with identity theft?