Show one post on main page and list in category page

This is my current code:

[quote]<?php get_header(); ?>
<div id=”content” class=”clearfix”></p>
<p> <div id=”left-col”></p>
<p> <?php if (have_posts()) : ?>
<?php
if(isset($_GET[‘author_name’])) :
$curauth = get_userdatabylogin(get_the_author_login());
else :
$curauth = get_userdata(intval($author));
endif;
?>
<div class=”twitter clearfix”>
<p class=”color-blue”>
<?php $post = $posts[0]; ?>
<?php if (is_category()) { ?>
<h4 class=”font-georgia”>Archive for the ‘<?php single_cat_title(); ?>’ Category</h4>
<?php } elseif( is_tag() ) { ?>
<h4 class=”font-georgia”>Posts Tagged ‘<?php single_tag_title(); ?>’</h4>
<?php } elseif (is_day()) { ?>
<h4 class=”font-georgia”>Archive for <?php the_time(‘F jS, Y’); ?></h4>
<?php } elseif (is_month()) { ?>
<h4 class=”font-georgia”>Archive for <?php the_time(‘F, Y’); ?></h4>
<?php } elseif (is_year()) { ?>
<h4 class=”font-georgia”>Archive for <?php the_time(‘Y’); ?></h4>
<?php } elseif (is_author()) { ?>
<h4 class=”font-georgia”>Author Archive: <?php echo $curauth->display_name; ?></h4>
<?php } elseif (isset($_GET[‘paged’]) && !empty($_GET[‘paged’])) { ?>
<h4 class=”font-georgia”>Blog Archives</h4>
<?php } ?>
</p>
<!– End Title –></p>
<p> <?php while (have_posts()) : the_post(); ?></p>
<p> <?php // To show only 1 Category
$category = get_the_category();?></p>
<p> <div class=”post-content clearfix”>
” rel=”bookmark” title=”Permanent Link to <?php the_title_attribute(); ?>”><?php the_title(); ?>
</div><!– End post-content (post-<?php the_ID(); ?>) –></p>
<p> </div><!– End post-<?php the_ID(); ?> –></p>
<p> <?php endwhile; ?></p>
<p> <div class=”single-meta clearfix”>
<div class=”left”><h4 class=”single-info font-georgia color-white size”><?php next_posts_link(‘? Older Entries’) ?></h4></div>
<div class=”right”><h4 class=”single-info font-georgia color-white”><?php previous_posts_link(‘Newer Entries ?’) ?></h4></div>
</div></p>
<p> <?php endif; ?></p>
<p> </div><!– End left-col –></p>
<p> <?php get_sidebar(); ?><!– End right-col –></p>
<p> </div><!– End content –>
<?php get_footer(); ?>[/quote]

I tried installing the category list addon and put [catlist] where I want the posts to be listed, but it just displays [catlist] -.-