The problem isn't the image, title or description tags on the page. The problem is the following line:
<meta property="og:url" content="http://pueblounido.cl/?view=featured"/>
Can you check the Open Graph -> Configuration area of JFBConnect and make sure you haven't set a default value for the URL which points to
pueblounido.cl/?view=featured With that setting, it's telling Facebook that every page should use the tags from your home page, and that's what you're seeing.
If that's not the case, let me know what SEF extension you're using (if any), if you've added and {SCOpenGraph url=xyz} tags to the pages on your site, or if there's anything else you can think of that may be forcing the Open Graph url tag to something other than the current page.
Thanks,
Alex