This is what I am wondering myself. I have no problem waiting, I am just glad I saw this post as I was ready to buy one for a 15, not realizing there was a difference.
I finally got a reply back from my salesman. He said when they check vehicles in after delivery the website is automatically updated. I imagine its a database thing and their website (maybe cars.com as well) pulls from that dealers database. Not much I can do now but trust my salesman.
Im in a similar situation. Car arrived yesterday as I was leaving out of town for 2 weeks. Salesman said it was not an issue but I just noticed my car listed for sale on the dealer website. Sent a text message to my salesman but haven't heard back. Does any one know if this is standard...