They were never sold out. Only the olive green color was showing it was gone last night. I bought the orange one for a friend 30 minutes after they said it was sold out and it still had the sale price.
QVC often does that. I've seen Valerie items say "sold out" during the show. Go back an hour later and all is in stock.
They either take into consideration the amount of people on hold, calling in an order or it's cancelled or check hold orders not going through.
It's best to always go to the website and check when they say sold out. 9 times out of 10, it's still available.