iWeb automatically creates a navigation menu — a table of contents — on each page in your website which lists each page in your site as a link. Very long page names may not display correctly in certain themes. If you are using long page names, check the navigation menu of each page in your site to make sure that the links are displayed correctly. To see how the navigation menu appears in a web browser, publish your site to a folder and visit the site.
Tip: If you don't wish to see a page's name in the navigation menu, simply select the page in the Site Organizer and in the Page Inspector deselect the "Include page in navigation menu" checkbox.