I see that you have created "Max Payne". I reset your 1st address to Hong Kong, 2nd address to USA.
1. at checkout page (1st screen - delivery information, I choose Flat Shipping Rate, then press "continue" button).
2. at 2nd screen (payment information, I press "Change address", choose USA address (another address) and press continue).
3. Now the screen still keeping at (2nd screen, payment information). Here is the problem. I have changed the address from Hong Kong to USA.
In fact, the screen should return to shipping information page, but it doesn't jump back to shipping information screen.
Abantecart keep using the shipping method for Hong Kong only even I have changed the address to USA. The "order summary" sidebox also show that the shipping destination is Hong Kong. (incorrect).
Thank You for very detailed report. This is NOT a bug. At
shipping (say Delivery Information stage) You able to select Address for Shipping Only, next at the
payment (say Payment Information stage) You able to select another address for Payment Only. So User able to use different addreses for shipping and payment.
For example You located in USA but want to buy and ship something for friend in Hong Kong. Also at the Confirm Order page You can see both addresses and both Persons (see attached screenshot). If you need another way - you need to modify AbanteCart core.
See below picture, the weight is 0.00kg, it is incorrect. Abantecart doesn't calculate it correctly. I also showed 0.01kg (the actual weight should be more thatn 4kg) before
I see in Shopping cat page (index.php?rt=checkout/cart)
Shopping Cart (0.00kg) thats why you have
Hong Kong (Weight: 0.00kg). What weight You setup in the your product (Admin-Catalog-Products find product and click edit)? Did You set up here 4 kg?