[Theme: Suburbia] Get more posts on front page?

I have tried eding the following code so it’s set to this.

<?php include (TEMPLATEPATH . "/related.php"); ?>
    <?php
        if ( $paged == 0 ) {
            $offset1 = 0;
            $offset2 = 4;
        } else {
            $off = $paged - 1;
            $offset1 = $off * 9;
            $offset2 = $off * 9 + 4;
        }
    ?>
    <!-- LOOP1 -->
    <?php if (have_posts()) : ?>
    <?php query_posts('posts_per_page=4&offset='.$offset1); ?>

But I can’t seem to alter it without repeating posts. How do I fix it to get all the posts on the main page?

Site is: http://galleryeastnetwork.com/wordpress/