Clicking on the category show everytime the same products

Hi,

It's possible that it comes from an old view override.
Check if you have the file templates/YOUR_TEMPLATE/html/com_hikashop/category/listing.php
If you do, try renaming it.
If not, then try deleting that menu item and recreating it via the Joomla menu item. That might help too.

Also, I don't see any valid HikaShop Business subscription for either that website or your user account on our end.
So I'm not sure where you got it from but it's an old build without all the patchs we made since the release of the 4.2.2. So I would recommend to download the install package of the Business edition from our website and install it again on your website to make sure you have all the latest patches. That could help too.