Displaying only posts in selected category

I have a working category page, which displays a featured image and post title inside a box, and goes to the full post when clicked on. The only problem is each seperate category displays all posts (no matter the category). How would I code this to only dislay posts inside the selected category?

My code is below.

<?php
/**
 * The template for displaying Category Archive pages.
 *
 * @package Toolbox
 * @since Toolbox 0.1
 */

get_header(); ?>

		<section id="primary">
			<div id="content" class="product_gallery" role="main">

			<h1 class="cat_title"><?php single_cat_title(); ?></h1>

				<?php /* Start the Loop */ ?>
				<?php while ( have_posts() ) : the_post(); ?>

		<ul>
			<?php
			// we add this, to show all posts in our
			// Glossary sorted alphabetically

			$args = array( 'posts_per_page' => -1, 'orderby'=> 'title', 'order' => 'ASC', 'category'  => 'Piccolos' );

			$glossaryposts = get_posts( $args ); 

			foreach( $glossaryposts as $post ) :	setup_postdata($post);
			 ?>
				<div class="product_thumbnail">
				<a href="<?php the_permalink(); ?>">
					<?php the_post_thumbnail('thumbnail', array('class' => 'thumbnail')); ?>
					<p class="post_caption"><?php the_title(); ?></p>
				</a>
				</div>
			<?php endforeach; ?>
		</ul>

				<?php endwhile; ?>

			</div><!-- #content -->
		</section><!-- #primary -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>