Shipping Product not multiplying

Shipping Product not multiplying

I want to multiply the shipping costs calculated with the Shipping depend zip weigth addon with the quantity of the items.

In the settings of Shipping product I have set the checkbox to multiply the quantity with the price but it's not changing the deliverycosts.
I even tried disabling the zip/weight addon to check for a possible incompatibility but even with plain JoomShopping it's not multiplying anything.

Am I missing something or how is this supposed to work?

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Aw: Shipping Product not multiplying

Configuration: settings of Shipping product?

Addon: Shipping depend zip weigth
(There are no such settings in the addon)

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installed addon Shipping product or?

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