my link order- categories

I’m using the my link order plugin/ widget (and wp 2.51). The plugin works fine until I try to create an additional category with a link in it. For some reason the link appears in the new category AND in the main (original) category. In other words, I would like two categories of links on the sidebar with unique links in each category. Instead, any links I add to the new category appear in BOTH categories. When I ‘write’ the new link, I check the correct category box near the bottom of the write category page, but the link still appears in the new category AND the main (original) category. Any ideas what I’m doing wrong?