Product Navigation problem with VM 2

[jguardia9]

I have a Joomla 2.5.6 and VM 2.0.14 shopping cart installation. You could see the online shop here: http://www.instrumentsmorgui.com/index.php/es/   (I am sorry, there is not english version). It works very well except in one point not easy to explain, and I am looking for helping.

I am using different product categories to find products in the web ( similar to multicategories functionality), that means that one product could have few categories. It works properly except when I am browsing one product at detail level. In that point vm is changing the category browsed  in the main menu and in the breadcrumbs information line. The product information is correct.

I try to explain with and exemple :

Select :  Sector / Aplicación ;  Alimentario ; CALIDAD DEL AIRE KIMO AQ 100E i S

the products is browsed properly, but in the breadcrumbs appears the following :

Usted está aquí: Parámetros Sector / Aplicación Alimentario CALIDAD DEL AIRE KIMO AQ 100E i S     ( the categorie Parametros is not correct here )

instead of the correct that will be :

Usted está aquí: Sector / Aplicación Alimentario CALIDAD DEL AIRE KIMO AQ 100E i S

in addition the menu option in the main menu change from Sector / aplicacion to Parametros, that is not correct, it have to remain in the first one.

There is not relation between the categorie Parametros and the other ones ( Productos, Marcas or Sector /aplicacion ), all the four are at the same level, and the error will happen with any of the others and always the error occurs with the categorie Parametros. I have tried to eliminate this category, in this case, it happen the same problem but with another one of them, always in the first level.

As curiosity, if you navigate trough products. for example if in the product detail you move from CALIDAD DEL AIRE KIMO AQ 100E i S to the next one, that is CALIDAD DEL AIRE KIMO AQ 200, now it works properly and the categories in main menu and breadcrumbs are correct, and if you goes back to the previous one products in this product detail navigation system, again the categories are now correct and the problem not appears.

Sorry for my English and the extension of the email. It is not an easy error to explain.

I hope somebody could help me to solve it

Thanks in advance and best regards