elements header / footer includes

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In the theme I've built I've included the header/footer includes in all the page_type.php's, default.php, and view.php. Everything works great.

If I copy a page type to root/page_types and set it up with a new name, when displayed it will show "doubled" unless I remove the includes from it.

I've poked in other themes and it appears I have the includes properly in place. What could be the malfunction??

enlil