Minifolio – Slider problem

Hi,

Last month I bought a theme at Themeforest (Minifolio for WordPress)
The theme works perfect for me, except one thing.

When i click on a portfolio page, just 4 pictures are appearing in the slide show. In the code i found some lines which provides the possibility to add four pictures to the page.
They looked like this:

<?php if($img_post1){ ?>
<li><img src="<?php echo get_stylesheet_directory_uri() ?>/library/timthumb.php?src=<?php echo $img_post1 ?>&h=615&w=830&zc=1" alt="<?php echo get_the_title() ?>" /></li>
                        <?php } ?>

There where four of them, so i doubled them to ten.
Above this line i saw this line, which i doubled also to ten:

$img_post1 = get_post_meta( $post->ID, '_mf_image_1', true );
When i create a new portfolio-item i can add ten pictures to the page.

Now comes the problem:
When i go to the address, i can see only four pictures, but i uploaded and selected ten pictures..
The four pictures are appearing, but when i click next, the first one will show up again.

I tried to contact the developer of the theme, but he doesn’t respond anymore to people.

You can reach my site at https://www.angelavanlindt.nl

Can anyone please help me?

Kind regards, Paul