Can somebody help me understand this menu coding?

I'm using a program that exports a design as a Drupal theme.

The problem is, it seems to be dumping my navigation menu into the section of my page that should be primary links, so I end up having the nav menu in both my sidebar and in the horizontal bar and no primary links.

The program creates these four page templates:

page.tpl.php
page-blog.tpl.php
page-node.tpl.php
page-node-add.tpl.php

In all four of them, in the horizontal bar menu that SHOULD be primary links, I find this:

if (get_drupal_version() >= 6) {
	$menu_name = variable_get('menu_default_node_menu', 'primary-links');
	$tree = menu_tree_page_data($menu_name);
	echo art_menu_tree_output_d6($tree);
} else {
	echo art_menu_tree_output_d5(variable_get('menu_primary_menu',0));
}

Whatever this is, it results in the navigation menu, not primary links, to show in that section. I can't understand why. If I try to replace it with a simple "print $primary_links", it doesn't seem to work.

Any ideas?