title: RecyclerView onBindViewHolder called multiple times for one item
body: <p>I have used the <code>RececlerView</code> with the <code>ViewHolder</code> pattern for a while now.
  Im am implementing a custom <code>Adapter</code>.</p>
  
  <p>Im am not searching for a specific bug help in my code.</p>
  
  <p>I was just wondering, if it's normal, that the <code>onBindViewHolder</code> method is called multiple times (for the same item) while scrolling to the end of the list and scrolling back up. In this case <code>onBindViewHolder</code> is called again for item 0 and 1 (the list contains 7 items in total)</p>
  
  <p>Is there any possibility for this method to get called AGAIN without notifying that the datasat has changed? </p>
  
  <p>Im a bit confused.</p>
  
  <p>Kind Regards, 
  Palm</p>