Podcasts don't automatically download

I have an iPad with Retina display wifi and iOS 7. I have the Podcasts app settings set to check for new podcasts every hour and to auto download. However, the podcasts never update unless I open the app. Upon opening, all new episodes begin downloading. I thought the newest version would pull all my podcasts down in the background so when I open the app, they are ready to play. Am I mistaken?