Autoblog is adding unselected category in addition to the selected category for new posts.

This problem started with one of the recent updates of autoblog -- I've narrowed it down to posts on my site that have occurred after the 11th of January. In the past, the posts that autoblog would generate would be put only in the category I selected within that particular feed's settings. Since the 11th, however, they are being additionally put into the default category designated in the admin settings of the site. WordPress requires you to select a default category, so I can't fix the problem from that end. Has anyone else experienced this problem? It's quite annoying as I have to go back and change all the category settings for each individual post that autoblog generates.