next page links on HP looping error

Hi – In my categories all my next page/previous page links work fine, but on the homepage after clicking next page they just show the 1st page content over and over even though the url shows https://www.website.com/page/2/ etc.,

I presume this is come kind of query error? Should I be using a separate template for categories and index with a separate query?

here my index.php:

<?php get_header(); ?>

	<?php get_sidebar(); ?>

	<div id="content" class="narrowcolumn" role="main">

	<?php if (have_posts()) : ?>

	  <?php
   if (is_home()) {
      query_posts("cat=-3");
   }
?>

		<?php while (have_posts()) : the_post(); ?>
			<div <?php post_class() ?> id="post-<?php the_ID(); ?>">

				<div class="entry">
					<?php the_content('Read the rest &raquo;'); ?>
				</div>

			</div>

		<?php endwhile; ?>

		<div class="navigation prevnext">
			<div class="alignright"><?php next_posts_link('Next Page &raquo;') ?></div>
			<div class="alignleft"><?php previous_posts_link('&laquo; Previous Page') ?></div>
		</div>

	<?php else : ?>

		<h2 class="center">Not Found</h2>
		<p class="center">Sorry, but you are looking for something that isn't here.</p>
		<?php get_search_form(); ?>

	<?php endif; ?>

</div>

<?php get_footer(); ?>