Hi,
The order of the products on the frontend depend on how the "order column" and the "order direction" settings are configured in the products options tab / hikashop options tab of your menu item / module. ( the "random" setting, if activated, will supersede these settings)
If they are set to "ordering", then in will follow the order you configured on the backend listing.
However, note that the ordering you set in your backend is relative to the category. If you configure your products listing to display products from different categories on the same listing, then the "ordering" choice doesn't make sense because the products will be ordered based on values set across different categories. In such case, you can create a custom product field to enter the main ordering of each product, and then use the column of the custom field for the ordering.