previous_posts_link() – next page re-displaying same post twice

Hi there,
the issue i’m experiencing has to do with the previous_posts_link() function.

<?php
#####################
## NEWS & VIEWS    ##
#####################
if (is_page(59)) { ?>
    <h1><?php the_title(); //News & Views ?></h1>

	<?php query_posts('cat=5&posts_per_page=2'); ?>
    <?php if (have_posts()) : ?>
    <?php while (have_posts()) : the_post(); ?>

                    <h2><a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h2>
                    <?php edit_post_link('&uarr;&darr; Edit', '<span class="edit">', '</span>'); ?>
                    <div class="posts">
                    <?php the_excerpt(); ?>
                    </div>

    <?php endwhile; else: ?>
    <?php endif; ?>

    <?php previous_posts_link(); ?>
    <?php next_posts_link(); ?>

The link(s) for ‘next’ and ‘previous’ posts are displaying correctly, problem i have is when clicking through to page 2, the first post is being re-displayed..

Any ideas as to why this could occur?
Thanks..
CHEERS!