After using WP RSS Aggregator for about a day, I noticed that the pages I had the widgets on began to display strange behavior. The address of the pages (and maybe the title, as well--I can't remember) changed to the titles of some miscellaneous WP posts. And the category ('News') that was selected for one of the blog pages became de-selected, resulting in every post showing up in the blog.
I noticed the changes after putting 2 widgets on a page. I don't know if that had anything to do with it... just a potential clue. I also noticed that when I added the 2nd widget, the link at the bottom of each to see older feeds disappeared.
I hope you can help.