November builds imply you would order about 5 weeks before your car is built at the shortest. So if you wanted to be right at the beginning, the latest you could order is right about now. Of course dealers usually let you order a bit earlier then the 5 weeks, so you may find if you order now, your car wouldn't be made until later, since that's what build slots are open.
In any case, I'd trust motoringfile, and not dealers (they generally are the last to know anything) but perhaps you weren't trying to order a car for November, so maybe it can't be recognized. If you want the Anthracite headliner, I'd order and make sure your dealer knows you want it, and they can put your car in as soon as its available, so hopefully for an early November build and Dec or so delivery.
In any case, I'd trust motoringfile, and not dealers (they generally are the last to know anything) but perhaps you weren't trying to order a car for November, so maybe it can't be recognized. If you want the Anthracite headliner, I'd order and make sure your dealer knows you want it, and they can put your car in as soon as its available, so hopefully for an early November build and Dec or so delivery.