Facebook Share Link Not Correct - php

Question

I have a WordPress site that when you click the Facebook like button it likes the wrong url.
If I inspect the web page, the url that is inside the like widget is always the same URL no matter what post you are on. It is like one of the posts url is being set somewhere.
I have checked and it ONLY does it for posts, not pages.
I feel like I have found the area (might be wrong) but I believe it is here in the loop
<?php if (have_posts()) :
$post = $posts[0]; // Hack. Set $post so that the_date() works. ?>
<?php /* If this is a category archive */ if (is_category()) { ?>
<h3><?php printf(__('Archive for the ‘%s’ Category', TEXTDOMAIN), single_cat_title('', false)); ?></h3>
<?php /* If this is a tag archive */ } elseif( is_tag() ) { ?>
<h3><?php printf(__('Posts Tagged ‘%s’', TEXTDOMAIN), single_tag_title('', false) ); ?></h3>
<?php /* If this is a daily archive */ } elseif (is_day()) { ?>
<h3><?php printf(__('Archive for %s | Daily archive page', TEXTDOMAIN), get_the_time(__('F jS, Y', TEXTDOMAIN))); ?></h3>
<?php /* If this is a monthly archive */ } elseif (is_month()) { ?>
<h3><?php printf(__('Archive for %s | Monthly archive page', TEXTDOMAIN), get_the_time(__('F Y', TEXTDOMAIN))); ?></h3>
<?php /* If this is a yearly archive */ } elseif (is_year()) { ?>
<h3><?php printf(__('Archive for %s | Yearly archive page', TEXTDOMAIN), get_the_time(__('Y', TEXTDOMAIN))); ?></h3>
<?php /* If this is a yearly archive */ } elseif (is_search()) { ?>
<h3><?php printf( __( 'Search Results for: %s', TEXTDOMAIN ), '<span>' . get_search_query() . '</span>' ); ?></h3>
<?php /* If this is an author archive */ } elseif (is_author()) { ?>
<h3><?php _e('Author Archive', TEXTDOMAIN); ?></h3>
<?php /* If this is a paged archive */ } elseif (isset($_GET['paged']) && !empty($_GET['paged'])) { ?>
<h3><?php _e('Blog Archives', TEXTDOMAIN); ?></h3>
<?php }
while (have_posts()) : the_post();
global $more;
if(!is_single()) $more = 0;
$type_blog = ( $GLOBALS['yiw_custom_blog_type'] != false ) ? $GLOBALS['yiw_custom_blog_type'] : get_option( $GLOBALS['shortname'] . '_blog_type', 'classic' );
?>
It is setting the $post but I am not sure how to fix it or check that this is in fact it. If I remove it, the page does not work.
Any help here will help a lot, if I am not correct what else should I be looking for?
The following are also areas in the functions.php that have the $post in it
function catch_that_image() {
global $post, $posts;
$first_img = '';
ob_start();
ob_end_clean();
$output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
$first_img = $matches [1] [0];
if(empty($first_img)){ //Defines a default image
$first_img = get_stylesheet_directory_uri()."/images/default.gif";
}
return $first_img;
}
and
function get_current_ID()
{
global $post;
return $post->ID;
}
function get_current_pagename()
{
global $post;
return $post->post_name;
}