Dani, I replied to your Gold Appointment post with my experiences in DC so I won't repeat that here. I will say, I had the same panic because after submitting the application I never got a confirmation from VFS. We emailed them and were told they couldn't confirm until the week of the appointment. I didn't get an email confirming the appointment until less than 24 hours before. Now that everything is in Sheffield's hands, we get to play the waiting game.
I'm guessing this is a result of teething issues with the appqrently new service, so (maybe) don't panic if you don't get an email confirming the appointment.
-Kelvin