I am also noticing that the Post Calculations are incorrect!

For a product that weights 0.125 kgs (125 grams) is costing $7.70 to the same postcode as the shipping postcode!

I have set the (Parcel Weight format) in [kgs] in the shipping module.
I type (0.123) in the Product Weight: in the product info page.

I have tried several dimension and it's all the same!

If I change the (Parcel Weight format) to [gms], it changes the shipping cost to $4.55 which is correct, but now the bigger items which are 3 kilos have the same shipping cost as the 125gm item!!
even though I type (3) for the Product Weight: in the product info page which should reflect 3 kilos.

What am I missing?