I guess that such differences in confirmation address messages and tracking messages related to order date is to be linked to the time of feedback from support about confirmation address: the sooner you confirmed, the sooner support gave feedback and then prepared shipping.
Although I ordered on 7 July with payment on 10 July, I got feedback from support about confirmation address only on 6 April because I waited some hours before replying to support on 26 March.
So we should take in consideration the dates of the feedback from support about confirmation address: for me 6 April.
PS: not yet shipping info for me