Currently, if a seller has 2 products and has the same shipping for each, the system is combining the shipping instead of billing them separately. For example, they have product 1 with $15 shipping cost and product 2 with the same $15 shipping using the same carrier, instead of the total being $30 it combines them at $15. Is there any way for them to be billed separately without creating a new shipper for each? Thanks!
Yes, this is the way designed.
If the products from the same seller and the customer choose to use the same carrier, the shipping fee will be calculated by combining them together.
If you want shipping fee charged by product per item, you can set the shipping fee at carrier to $0, but set Additional Shipping Cost of the product.
In this way, it will calculated like the way you wanted.