Every time I check for updates in the App Store on the ipod, sometimes it gives me actual updates and sometimes, it'll give me applications that I already updated. Like, when I tap one of the apps in the Updates list, the button won't say "free" but it will say "installed". If I exit the App Store and re-enter, it may do this or it may give me a list of actual updates. It's almost always 9 applications when this happens. How do I remedy this problem?