I'm running into an issue, I think. My apps are set to auto update but they don't. An example is my Yelp app. There was an update released but it never updated on its own. When I went to look for the update, I had to search for the app and on the search screen the update button had a "+" in the top left of the button. I updated it manually and then went back and it's still there. Here's a screen shot. It's even on apps that I haven't installed before. What does that symbol mean? Also, why is it so persistent to not update the apps in the background even though under settings and iTunes App Store, it says it is set up auto download apps. Very strange.