PUBLIC MARKS with tags expressionengine & tutorials

Building a Site Map: iterating thru weblogs...

I have a single entry page. Within that page, I want to display the name of the category that the single entry post is associated with. I have this in the {exp:weblog:entries} tag: <h1>{categories}{category_name}{/categories}</h2> Works just peachy...unless the entry is auto-assigned to both parent and sub category. I only want to display the parent category name. How would I do this?

Creating an alphabetical navigation links based on the entries' titles