Sorry to see that. I've been ordering phones from the Google store before it was even called the Google store. They've always had problems with this stuff, and I don't understand why. At least they're letting you know about it.
I ordered late on the 19th, because it was too hard to get a order in early. Mine has changed about 5 times, but I haven't got that email yet.
For the record, my estimated delivery is now Now 12-13. It has been as late as Nov 17-18, and as early as Nov 4-5. I suspect I may get the same email soon. Ordered: Cloudy white 128GB 6 pro.