I created a test page to demonstrate what is happening:
Below the "submit order" and "edit account information" buttons is a white space which I don't want to be there. The space is in-between the elements div#content and div#bottomswirls. It appears to be related to the form element on this page. If I take away the form element, the space goes away.
However, I don't understand why it is there, or what I can do to get rid of it. My margin and padding are set to zero already.