When selecting USPS Flat Rate Envelope for International shipping with the price calculated, verification generates an error message that the package type is deprecated and that it has been converted to package/envelope and the size and weight are missing. When using a domestic flat rate package, the shipping fee is truly “flat”; the same for any destination. Internationally, that is not true. Using a flat rate envelope results in different fees for different countries. For example, a FRE to Canada is $26.90USD. The same envelope to Japan is $35.35 and to Australia is $38.60. I realize I could set the flat rate to the highest fee, but that seems unreasonable from the customer’s perspective. Is there something I’m missing?