Multiple Pages Per Post Problem

When using the <!–nextpage–> in a single post, the Page links appear in two different areas. One above the entire post, and one below at the bottom of the post. This is a problem, and where can I go to edit the location and placement of the Page links? What files should I be looking into?

For reference, I am using the Stargaze theme: http://www.web2feel.com/stargaze/

Thanks,
SuperZambezi