What is with some companies?

I got a call today from a company that found my resume on Monstor.com. Now, my resume has network and systems administration and programming experiance all over it. This company wants me for payroll and benifits managment administration. They say I am perfect for the position. I get the feeling the are trying to recuit me for something else. I have decided to be self-employed, but should I call them back and set up and interview just to see what its about?

Ned