The plot gets better
So I went to do the Best Rate Guarantee. So when I went to starwood.com find the rate that they were quoting for the same rate (Summer Rates: airport transfers, continental breakfast and champagne) I found the 35 GBP online. I booked it for one day longer and got a Starwood confirmation. Haven't cancelled the original orbitz one yet but I guess I will in a couple of days. Went back to try and do it again and it was gone. Seems like the computer error is happening in spurts. Best of luck.
Anybody though who has gotten something like this before, please report on your experience.