What shipstation does not understand is we have employees who need to figure out the cheapest way to ship an item. By not populating the calculator with all the Priority Mail options it slows our employees down tremendously because they have to change the package type to flat rate, Regional A, or Regional B.
In the old version, it was fine. This is the worst Upgrade I have ever seen and forcing us to this new version is terrible. I wish there was another type of shipping software as I would leave ShipStation today!