This has been working for us, however - this is because the GA goal success doesn't depend on consecutive page views but can occur in any order. So if a page in the funnel is never "triggered" GA just assumes that if the user made it to the next step they also made it to the previous step. I've attached a screen shot. I've updated my goal to reflect the proper URL.

BTW: Because Ubercart has such a simple and robust checkout process our success rate is stupendous! Now we just need more visitors!