One-Page Checkout [Support Thread]

[lat9]

I have a question that I don’t know how to solve it.
when I am on the checkout page, guest checkout in this example, I fill in the contact info window but didn't click [save changes],then i submit,order will not include contact info.
I want it to submit contact info to the order without clicking the save button.
Of course, Billing Address also has to deal with this, who can help me.

That's not the way that OPC 2.0.0 was designed to work. Those Save buttons on the customer-info and addresses (er) save the information in the customer's current session (via AJAX calls) so that they are available to include in the order.