Hi,
Thank you for the information.
So to answer your problematic:
It's not possible to have the system return to the categories listing when you clear the filters.
And yes, you should have the "force redirect" setting activated in your case.
The filters can work on the categories listing, but in your case, you would have to have the "sub element fitler" setting of the "products options" tab of your menu item to "all sub elements" and you would see all the products below the listing of the categories, and when you would use the filter, you would see the results below the listing of categories, so it's not really practical in your case.