Why can't I view my snapchats?

I'll sometimes get a notification saying I've received a snapchat but whenever I go to the app and try to view it, it doesn't show up in the feed. I've restarted my phone, logged out then logged back in, cleared the feed, and even redownloaded the app multiple times but this still continues to happen. Anybody know how to permanently solve this problem?

PS. I have an iPhone 5 and its running iOS 7.

10 POINTS FOR BEST ANSWER!

?2014-04-09T21:43:48Z

If this is recent snap is having some problem just give it a day or two. But if this has been going on for a while. Go to your applications and clear the data (idk how the iphone works but im sure that option is there)