post list

click category>>> then the posts i have created appear as a neat list, not like when you click a category your posts show up 1 after another with the content.

The display of category archives is controlled by Category Templates so if you were using the WordPress Default Theme you could create a template called category.php with this code:

<?php
/**
 * @package WordPress
 * @subpackage Default_Theme
 */

get_header(); ?>

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

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

		<?php while (have_posts()) : the_post(); ?>

			<div <?php post_class() ?> id="post-<?php the_ID(); ?>">
				<h2><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
				<small><?php the_time('F jS, Y') ?> <!-- by <?php the_author() ?> --></small>

			</div>

		<?php endwhile; ?>

		<div class="navigation">
			<div class="alignleft"><?php next_posts_link('&laquo; Older Entries') ?></div>
			<div class="alignright"><?php previous_posts_link('Newer Entries &raquo;') ?></div>
		</div>

	<?php else : ?>

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

		<?php get_search_form(); ?>

	<?php endif; ?>

<?php
//}
?>

</div>

<?php get_sidebar(); ?>

<?php get_footer(); ?>

Related:
Stepping Into Template Tags
Stepping Into Templates
Template Hierarchy
the_content()
the_title()
the_permalink()

Well you’ll have to adjust/edit/add div’s based on your theme. Look at your theme’s index.php for ideas.

I’ll direct you to CSS.