Ajax Load more posts broken – website link available

[Topic title de-capped. Please do not shout at us.]

Hi,

This is my site: http://test.lafsdesign.com/
When I click “Load more posts,” the posts appear in weird places behind the other posts above.
Please help me fix it.. :’(

This is from function.php

<?php if( ( ! is_singular() && ! is_paged() ) || ( ( is_page_template( 'template-blog.php' ) || is_page_template( 'template-blog-full-width.php' ) || is_page_template( 'template-blog-four-col.php' ) || is_page_template( 'template-blog-left-sidebar.php' ) || is_page_template( 'template-blog-no-sidebars.php' ) || is_page_template( 'template-blog-no-sidebars.php' ) || is_page_template( 'template-portfolio.php' ) || is_page_template( 'template-portfolio-right-sidebar.php' ) || is_page_template( 'template-portfolio-four-col.php' ) || is_page_template( 'template-portfolio-left-sidebar.php' ) || is_page_template( 'template-portfolio-no-sidebars.php' ) ) && ! is_paged() ) ) : ?>
				<?php if( 'ajax' == wptheme_get_option( 'posts_nav' ) ) : ?>
					var nav_link = $('#posts-nav .nav-all a');
					if(!nav_link.length)
						var nav_link = $('#posts-nav .nav-next a');
					if(nav_link.length) {
						nav_link.addClass('ajax-load');
						nav_link.html('Load more posts');
						nav_link.click(function() {
							var href = $(this).attr('href');
							nav_link.html('<img src="<?php echo get_template_directory_uri(); ?>/images/loading.gif" style="float: none; vertical-align: middle;" /> Loading more posts …');
							$.get(href, function(data) {
								var helper = document.createElement('div');
								helper = $(helper);
								helper.html(data);
								var content = $('#content .entries', helper);
								$('.entries').append(content.html());
								var nav_url = $('#posts-nav .nav-next a', helper).attr('href');
								if(typeof nav_url !== 'undefined') {
									nav_link.attr('href', nav_url);
									nav_link.html('Load more posts');
								} else {
									$('#posts-nav').html('<span class="ajax-load">There are no more posts to display.</span>');
								}
							});
							return false;
						});
					}

Thank you so much in advance,

Jeanette