2 Apr 14, 2010 18:15
Seems like your posts linked in both categories now. Edit any post (make sure to edit /conf/_admin.php to allow crossposting) and see if it has 2 categories. You may need to edit all posts one by one or try to remove the original category.
If the above is not true you might have one blog aggregating another. Check the settings for original blog where you moved the posts from.