I think I have misunderstood what the categories are for.
Once a month, bloggers in my group create a post for a specific purpose, and I manually pull them together on a single page of my blog with links to their posts. What I want is a plugin to do this automatically. It was suggested that an RSS aggregator would be the way to go. I was thinking that the category you refer to would allow me to bring in posts which the bloggers have given an agreed upon category, like "throwback thursday" would only bring in posts with that category, but in reading your FAQs on categories, it doesn't sound like what I need. Can your plugin do what I need? If not, any chance you know what would? Thanks!