Imagine if you get in that situation next time?

It was ..and I CHECKED the confirmation, knowing I hadn't entered the vouchers that I KNEW ahead of time were required.

So.. I hit "cancel" on the prompt to confirm "A clearly incorrect order"

Then I interacted w/ the page - really just clicked to put focus back and take a look - then keyed my vouchers..and hit buy again.

And then.... I CHECKED THE CONFIRMATION... and it was "cleary the correct order", so I confirmed....