Showposts being “odd:

Hi

I have this function in my theme:

//my functions
function getThumbs($amount) {

	echo "<div id=\"media-gallery\">\n";
	echo "<h2>Media Gallery</h2>\n";
	echo "<ul>\n";

 			query_posts('showposts=' . $amount . '&cat=1,6&orderby=rand');

				while (have_posts()) : the_post(); 

					$category = get_the_category(); 

					if ( in_category('6') ) {
						$catnicename = "showreel";
						$custom_fields = get_post_custom();
				     	$images = $custom_fields['showreel_thumbnail'];
					} else {
						$catnicename = $category[0]->category_nicename;
						$custom_fields = get_post_custom();
				     	$images = $custom_fields['image_url'];
					}
				  		  if(is_array($images))	{
				    		foreach ( $images as  $value )

							if ( in_category('6') ) {
										echo "<li><a href=\"";
										the_permalink();
										echo "\"><img src=\"";
										echo str_replace(".jpg", ".gif", $value);
										echo "\" alt=\"" . get_the_title() . "\" /></a></li>\n";
							} else {
									echo "<li><a href=\"";
									the_permalink();
									echo "\"><img src=\"/image/galleries/";
									echo $catnicename;
									if (!isset($listOnly)){
										echo "/frontpage/";
									} else {
										echo "/largeThumbs/";
									}
									echo $value;
									echo "\" alt=\"" . get_the_title() . "\" /></a></li>\n";
							}

							}
				endwhile;
		echo "</ul>\n";
			echo "</div>";
}

Which i call using:

<?php if (function_exists('getThumbs')) getThumbs(55); ?>

It behaves… oddly, usually returning 55 posts, but sometimes 56!

Any ideas why?

Can be seen here: https://davidswain.co.uk, click refresh a few times.. Doesnt do it on the localhost, just the webserver!