When someone adds a product to their cart, with a quantity of 1, the rate was being calculated. But if we changed the product quantity to 2, the rate was doubled

Customer :

When someone adds a product to their cart, with a quantity of 1, the rate was being calculated. But if we changed the product quantity to 2, the rate was doubled. It seems to be working as if the products will be shipping separately? They shouldn’t get charged for the shipping rate twice, only once. How do we make it so that it calculates this correctly and only charges them once for the shipping?

Support :

This issue can be easily resolved by changing the parcel packing option.

You must have selected “Pack items individually” in Parcel packing option (in plugin settings).

Kindly change that to “weight based“, because you are in need of weight based calculation (as I can make out from your last query).

With Box Packing & Pack Items individually options dimensions & weight will be considered to calculate the shipping cost. refer the details below:
Parcel Packing: WooForce plugin provides you three options to pack a parcel(s) as given below:

• Pack Items Individually:  In this option, each item in the cart is packed separately. Total Shipping cost calculated by adding shipping cost of each item.
  For example, The shipping cost of Item X is $10. If the customer adds two quantities of Item X to the cart,  then total shipping cost is  $10 x 2, which is $20.
  Note: This is the default option.
• Pack into boxes with weight and dimensions: If packing items individually does not suit to your business, then you can define required box sizes under Box Dimensions section. All the cart items are packed into custom boxes defined in Box Dimensions settings. The best fit box is auto chosen from the defined boxes.
• Weight based: In this option, the weight of all the cart item is summed up and passed to UPS API to get rates.