Pagination shows same content / randomize portfolio view

Hi,

I’ve been trying to get pagination to work in my custom theme, but can’t seem to figure it out. I searched forums and basically tried everything that fixes it for other people but still no succes for me. I mean it shows and all, but all the pages show the same content

Here’s my template code:

<?php
/* Template Name: Portfolio */

get_header(); 

query_posts('post_type=portfolio&posts_per_page=9');

?>

<div id="portfolio" class="group"> 

<h1><?php the_title(); ?></h1>

<div class="group">

<?php if (have_posts()) : while (have_posts()) : the_post(); ?>

    <?php
        $title= str_ireplace('"', '', trim(get_the_title()));
        $desc= str_ireplace('"', '', trim(get_the_content()));
    ?>   

    <div class="item">
                <div class="img"><?php the_post_thumbnail(); ?></div>
                <p><strong><?=$title?></strong> <?php print get_the_excerpt(); ?><br><?php $site= get_post_custom_values('projLink'); if($site[0] != ""){ ?><a href="<?=$site[0]?>" target="_blank">(Visit website)</a><?php }else{ ?>No website<?php } ?></p>
    </div>

<?php endwhile; ?>

<nav class="pagination">
<?php pagination_bar(); ?>
</nav>
 <?php else : ?>
<!-- No posts found -->
<?php endif; ?>
</div>

</div>

<?php get_footer(); ?>

This is in my functions.php:

function pagination_bar() {
    global $wp_query;

    $total_pages = $wp_query->max_num_pages;

    if ($total_pages > 1){
        $current_page = max(1, get_query_var('paged'));

        echo paginate_links(array(
            'base' => get_pagenum_link(1) . '%_%',
            'format' => '/page/%#%',
            'current' => $current_page,
            'total' => $total_pages,
        ));
    }
}

Also I’m trying to show the portfolio items randomly.. No succes either 🙁