Hi alipaca, you can deactivate debug because it is displayed on top of your website.
These are the two notices showing up on your website. Fixing them could solve your issue. I am not sure though.
Notice: wpdb::escape is deprecated since version 3.6! Use wpdb::prepare() or esc_sql() instead. in /home4/alisonr3/public_html/wp-includes/functions.php on line 3378
Notice: Undefined index: war_soundy_preview in /home4/alisonr3/public_html/wp-content/plugins/soundy-background-music/templates/front-end.php on line 57
The first one is a function and the second one is related to your theme.
If fixing does not solve your issue of adding extra images, I still recommend asking your host about you not being able to upload more images to the plugin.
Regards