## Problems with Zone Rates shipping module

First of all, excuse me for my bad English, I'm not a native English speaker so I'll just try to be as clear as possible.

This is the situation, we have 3 different shipping rates based on location of the customer. 1 for the Netherlands, 1 for Europe and 1 for the rest of the world. Therefor I used the zone rates shipping module. And for some reason I must be overlooking something but I can't find out what.

ZC does indeed calculate the shipping costs based on the location of the customer and it takes the values I put in, but it only takes the first 2 values and if it is more than that it just multiplies the second value. For example when a customer orders a necklace that weighs 120grams, ZC calculates the shipping costs like this:
Shipping to NL (3 x 44.00g)
So it just takes 3 times the price that correspondents with the 50 value, wich is more than when it would take the price for 250.
And this is what I have in the shipping table:
20:0.50,50:1,100:1.50,250:2,500:2.50,2000:3

Calculation method is weight and for handling I tried order and box, but no difference noticeable.

Anyone here. who has an idea of what could going wrong? I'm clueless