Having an order in the system with a number and status does not affect the allocation list. You can send me your order at any time to input for an order number. It is not absolutely necessary to do so until there is an allocation available. Many like to see their order number and know they have an order in GM Workbench.
Also I apologize if you're viewing this guide on mobile and it isn't easy to read, it could not be formatted for both mobile and desktop.
1100 Preliminary Order Entered
2000 Order Accepted by GM - Your Car Will be Built
3000 Order accepted by Production Control
3300 Order Scheduled for Production by Assembly Plant
3400 Order Broadcast for Production - TPW Now Available
3800 Vehicle Has Been Produced
4000** Available to Ship to Dealer
4B00** Bayed - Awaiting Transport Company Pickup
5000 Vehicle Delivered to Dealer
**At this time GM is typically getting produced Corvettes to us quick enough that there may not be updates between 3800 and 5000.