How can I have only 1 SEF link and 1 canonical link for every product?

[isuv]

Hello guys,

In relation with this http://forum.virtuemart.net/index.php?topic=123959.0 and decreasing number of indexed pages by Yandex (for now), I really need your advice urgently. As I don't understand how to avoid that bug, I want to set only 1 SEF link and 1 canonical link for each product of our shop. How can it be done?
Every product is situated in category 1, its subcategory and its subsubcategory. And also in category 2, its subcategory and its subsubcategory. Subcategories have Joomla menu items, subsubcategories and categories 1 and 2 don't have Joomla menu items. VM 2.0.24, Joomla 2.014 or 2.0.20. By the way, this solution http://forum.virtuemart.net/index.php?topic=116324.15 didn't help me to avoid categories in urls.