Category generated three level meny

Hi,

I use this plugin to generate an “expandable” meny of all the parent-child-grand categories I have (around 200).

{exp:cat_expand:wrapper}
{exp:weblog:categories weblog="Test" style="nested"}
{exp:cat_expand:expander category="{category_id}" active-style="font-weight:bold; "}
<a href="http://{path=Test/sak}">{category_description}</a>
{/exp:cat_expand:expander}
{/exp:weblog:categories}
{/exp:cat_expand:wrapper}

Everything works fine, except for that at times the content of the parent category page is not that of the parent, but that of one of the kids (although only the parent category is chosen - I’ve checked). I’ve experienced this problem before, too, with some other technique of generating menyes from categories dynamically. Why does this happen?

Thanks a lot!