Hi did anyone find out what was happening and a resolution?
I am trying to go live with my new shop but also having the USPS Live shipping problem. It is only offering regular Priority Mail where it is available as a 1-day (i.e. in NY since we are in NY) but to California it is only giving a Priority Mail EXPRESS option which is crazy expensive. $37 on an $8 product sale.
Shopify says it's USPS and USPS says it's Shopify....