When pricing by weight it still shows me the base price. 
Auteur : Bohumir V.
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Additional prices and weights cannot be set.
Posté le
Did you set cost to weight?
see here for more info:
https://guide.websitex5.com/en/support/solutions/articles/44000684298-how-to-define-shipping-costs-based-on-the-weight-of-the-order