Hi Cynthia,
Actually, all magnets have a north and south pole (a magnetic with just one pole would be called a " "magnetic monopole" no one has ever discovered one). The Earth, for instance, has both a north and south magnetic pole.

As a simple picture you can think of a simple sunspot group as being like a bar magnet with a north and south pole. It isn't really quite that simple, but that is the basic idea.

cheers,
Terry