BUG VM Featured Products module. Changing all products categories in URL

[JoomlaMalaga]

Hello.

I have VM - Featured Products module, to show 'random products' in mi site.

The problem is that when I acess the page and I select a product, the category for that product remains forever in the URL and navigation path while I am suing VM - Featured Products module. So when I select another product from another category, this still display the category from the previos product in the URL and in the navigation path, wich is wrong.

This is also a problem, since Goolge is indexing every single product with every single category of my site. The result is that I do not have N products indexed but N x categories, indexed.

Could anybody guess what is happening ?

Thanks in advance.

I am using:
Joomla          2.5.8
VirtueMart2  2.0.16
PHP              5.3.15
Joomla Friendly URLs activated
Joomla URLs overwritten activated (.htaccess by default)
VirtueMart2->Configuration->Shop-> Administrative Multivendor -> nothing
Multilingual site (spanish and english)