Default shipping price interfering with postal code prices

Hi,

First of all, sorry for my bad english, I’ll try to explain as best as I can.

I’ve created a default value of shipping rates (20$), and differents rates for some postal codes. The problem is that the default value is offered even if it supposed to have another price for this particular postal code.

Ex.:
Default shipping price is 20$.
Every postal code starting with G2G should be 10$.
But the shipping price offers me radio buttons with this two amounts (20$ or 10$), it should only be 10$ and not offering the 20$ option.

I’ve tried to put all my postal codes with a particular price in the “except”, same problem.

What am I doing wrong ?

Thanks for your help !

https://www.ads-software.com/plugins/woocommerce-table-rate-shipping/