Using the loop to display content, every page only displays Homepage

I am building a theme in WordPress and being a little out of practise I am struggling to make The Loop work properly. I have inserted the most basic loop into the theme and it displays the content fine.. but when I click onto another page or the news page etc, it still just displays the home page.

I’m not sure if I’m just being oblivious to some blindingly obvious problem with my code, but I assumed that the loop displayed whichever page you were currently viewing, or do I have to set up a mishmash of if(is_page(‘home’)) then do a certain wp_query etc?

The loop code I have is inserted below, and if theres any information I forgot I will try update this post with it.

<?php query_posts(); ?>
    <div class="content">
    <?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
        <h2><?php the_title() ;?></h2>
        <?php the_content(); ?>
    <?php endwhile; else: ?>
        <p>Sorry, no posts to list</p>
    <?php endif; ?>
    </div>

Summary: The Loop is only displaying Homepage content on every page.

edit:

Even after disabling my plugin with the first loop in it, the proper Loop isn’t working. it is the exact code posted above, and it just won’t display the page I am on, or the news on the correct page or anything…. what am i missing