Hi Nicolas,
I can solve the problem. I'm reading about double product listing in HikaShop. OK, you can determine the second product view via Firebug and in the views -> Shop Module delete the product module. This is a solution but not a good solution because the product view can not be configured because the product module does not exist and the remaining indicator is represented by the main product configuration.
Why occurs twice the display?
The double display of the products are mostly present when a menu from Joomla refers in HikaShop. This occurs only when the product overview is set in the HikaShop options in the Joomla menu. The products in each category are displayed as well as the product overview of selected products (the second product view).
Why this is so but I can not say.
To avoid the duplicate products display, select the category summary of HikaShop in the Joomla menus.
So I get off the double product display.
Best regards,
Daniel