Weights not included in GetSellerTransactions response

The shippingdetails are shown based on how the transaction was checked out, not based on listing.

For example: If the item was listed in US site and buyer was also from US. While checking out, buyer used domestic shipping services, which were flat, so CalculatedShippingRate node and weight values will be missing in the response whereas if the same item was bought by CA buyer, and international shipping services was used during checkout, it will show calculated rate and the weights as well.