Thank you for all your assistance. The module works now as we want to.
I would suggest in the configuration/checkout section of Joomshopping, that in the info note (I) on Free shipping, you promote this module more. It is not clear from your site, that you can do this. This module makes it possible, but it is not obvious to me, or to my web designers.
Thanks again, I don't know your name, but you've been very helpful and we are really happy that this problem/issue is solved.