Ranges of weights

Hi,

I installed the plug but don’t under stand why the good rule is not selected in my cart.

i have multiple ranges of weight, and no matter what contains the cart, it always display the first one.
Can’t i have multiple intervals of weight, and adding flat price depending of the total weight of the order (including if there is multiple copies of one product) ?
Weight Flat €
100g -> 2
500g – > 6,5
1 Kg – > 15
2 Kg – > 20

Thansk

https://www.ads-software.com/plugins/weight-based-shipping-for-woocommerce/