Description
When there are present parent options and child options and some of the values in child options are marked as 'Default' such options became parent and showed up on the page.
 
Solution
We have corrected this behavior with the following patch:
http://www.viart.com/downloads/items_properties-4.0.8.zip
 
Download the file above and extract 'items_properties.php' into 'includes' folder of your shop. Please do not forget to make a backup copy of existing file in case something goes wrong.