Why can't I redownload my apps after iOS 7?

I updated my iPhone 4 to the new iOS 7, but when I go to redownload my apps in the App Store they just say 'Open' there's no download option. Can someone help me?

Chances are you apps are in the very last home screen page. Swipe right until you reach your last page. Once you reach your last page continue to swipe as if there's another page. This was what happened to me. My apps were all missing and for some reason they were on a page 2 swipes after what I thought was my last page.

Mine were on the next pg too.

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