Loading same 3 posts

My classes are set up properly and the ajax seems be working, however when I load more, it just loads the same 3 posts.

                        <div class="f-photo-wrapper">
	                        <ul class="site-main">
							<?php
							$paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;
							$args = array (
							    'posts_per_page' => 3,
								'post_type' => 'photos', 
								'paged' => $paged
							);
							$wp_query = new WP_Query($args); // exclude category 9
							while ($wp_query->have_posts()) : $wp_query->the_post(); ?>
							
							<li <?php post_class(); ?> id="post-<?php the_ID(); ?>">
								<a href="<?php the_post_thumbnail_url(); ?>" rel="lightbox" class="fgallery_fancybox"><?php the_post_thumbnail(); ?></a>
							</li>
							
							<?php endwhile; ?>
	                        </ul>
	                        
	                        <div class="navigation">
	                            <ul class='nav-links'>
	                                <li><a href="#" class="previous">Previous</a></li>
	                                <li><a href="#" class="next">Next</a></li>
	                            </ul>
	                        </div>
							<?php wp_reset_postdata(); // reset the query ?>
                        </div>