digital and natural goods in the same cart

-- url of the page with the problem -- : vigla.net
-- HikaShop version -- : 2.50
-- Joomla version -- : 3.4.3
-- PHP version -- : 5.6.23
-- Browser(s) name and version -- : Chrome

Hello,
I have created different shipping methods (manually) for digital and natural goods. Because the shipping for digital goods is zero.
If the customer buy only digital or only natural goods, the shipping methods work correctly.
If the customer buy e.g. one digital and one natural goods which the latter needs delivery and it has a cost, then, in the checkout the shop shows both shipping methods. Obviously one for the free and one for the natural good.
The problem is that if the customer click on free (why not), then the natural goods with has a cost for deliver will be delivered for free.
I disabled the option for showing shipping methods for digital goods (eg. there is no need for shiping address), and then a new problem: It shows only the shipping method for the natural goods, the the shop apply shipping cost on the digital item too.

Is there any way the separate either shipping method in the checkout/cart function?

Thanks and regards
Leonidas

Thank you very much!
It solved!
Leonidas