My b2evolution Version: Not Entered

I'm working on a new template/skin2.0 for my website at http://www.amaranthsgardens.com/blog/ to match the other pages that are already there.

The blog area looks good so far (still have to get the menu to dropdown like the other pages) but the problem is that any links to index.main.php that include a ?disp={whatever} seem to re-render the index.main.php page's content within itself. You can see examples by using the Contact page or by testing the last 3 links in the Common Navigation Links widget at the bottom of the right-hand column.

Any ideas how to correct this? Bear in mind that it's very possible that I have simply mucked up either the style.css sheet or any number of the other include files or even index.main.php itself.

Thanks, Jeff