It works fine for me except when i click "My billing information is the same as my delivery information.". If that box is clicked i have to click on "Review order" two times because on the first click i get "You must select a shipping option before continuing."

If i click somewhere on the page after the box "My billing information is the same as my delivery information." is checked it calculates the shipping again and the messege "You must select a shipping option before continuing." doesn´t show up. So I have to click somewhere else on the page after the box is checked to make it work.

How can i fix this?

Thanks in advance