title: Facebook sharing shows more than one miniature
body: <p><a href="https://developers.facebook.com/tools/debug/og/object?q=www.casadoheroi.com.br" rel="nofollow">Debug</a> is showing no errors or warnings, my <code>og:image</code> is 200x200, and even then I get other 2 miniatures in the share page in facebook.</p>
  
  <p>I tried to explode the <code>og:image</code> to 1000x1000 and then it was the 1st option presented instead of the actual 3rd, so I think the image size of those 2 other images are the matter.</p>
  
  <p>I saw that the <code>og:image</code> should be the only miniature offered, once it's validated.</p>
  
  <p>I would like it to be so, please advice. Thanks. </p>