Hi,
I've found the issue why the shipping address it doesn't display in the back-end.
The problem is when the user is going back to edit his "Step 1" settings. For example when he hits the back button on the browser is redirecting to his first step where the shipping address is filled automatically with United States and it can't be edited anymore and because of that all that we see in back-end is United States and nothing else.
This happens only when the users selects USPS. With UPS this problem doesn't exist, everything is working as it should.
Please see attached screenshots.
I've send all logins via your contact form.
thanks!