title: cellForRowAtIndexPath is called twice
body: <p>I'm displaying a dynamic table view initialised through a storyboard.
  Nothing fancy, just initialising 3 cell with text labels.</p>
  
  <p>Here is what actually happens:</p>
  
  <pre><code>2014-08-15 12:39:19.909 PopTestAnimation[31825:60b] numberOfSectionsInTableView
  2014-08-15 12:39:19.926 PopTestAnimation[31825:60b] numberOfSectionsInTableView
  2014-08-15 12:39:19.927 PopTestAnimation[31825:60b] numberOfRowsInSection
  2014-08-15 12:39:19.929 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 0
  2014-08-15 12:39:19.943 PopTestAnimation[31825:60b] Displaying row: 0
  2014-08-15 12:39:19.943 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 1
  2014-08-15 12:39:19.945 PopTestAnimation[31825:60b] Displaying row: 1
  2014-08-15 12:39:19.945 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 2
  2014-08-15 12:39:19.946 PopTestAnimation[31825:60b] Displaying row: 2
  2014-08-15 12:39:19.947 PopTestAnimation[31825:60b] numberOfSectionsInTableView
  2014-08-15 12:39:19.947 PopTestAnimation[31825:60b] numberOfRowsInSection
  2014-08-15 12:39:19.948 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 0
  2014-08-15 12:39:19.949 PopTestAnimation[31825:60b] Displaying row: 0
  2014-08-15 12:39:19.949 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 1
  2014-08-15 12:39:19.950 PopTestAnimation[31825:60b] Displaying row: 1
  2014-08-15 12:39:19.951 PopTestAnimation[31825:60b] cellForRowAtIndexPath: 2
  2014-08-15 12:39:19.952 PopTestAnimation[31825:60b] Displaying row: 2
  </code></pre>
  
  <p>It seems like every cell is initialised twice for some reason. Any ideas why?</p>
  
  <p>Here is the <a href="https://github.com/nderkach/popanimationtest/blob/master/PopTestAnimation/TraffleViewController.m" rel="nofollow">code</a></p>