Template Colour Settings Error

When creating a new template I have a colour settings available in the template options, but after saving the template these are lost and all I get is the following error message:

Warning: sizeof(): Parameter must be an array or an object that implements Countable in /home/tooltime/public_html/wp-content/plugins/wp-lister-for-ebay/views/templates_edit_page.php on line 195

Also is there a way of changing the size of the product images shortcode img_1 ?

Thanks