Hi,
When you edit your modules via the Joomla modules manager, under the "hikashop options" tab, there is a display section where you can turn off the "product page" display.
Note that when you assign a module for a menu item, the module will normally display for all the pages of that same menu item. And thus, when you click on a product of a categories listing menu item and access its product page, you are still on the same menu item. That's why we added these display settings so that you can control more precisely on which pages the modules should display on a same menu item.