I would like to add that I fully agree with amortconfections. I tried to report this to the online customer service and I was not able to get them to understand the shortfalls of this option when using preorder. I agree that this is a development enhancement that should be considered.
It is not always easy to explain to customers if they are not on your mailing list to show what to do. I will say until amortconfections pointed out there was a edit button I did not see it. I happened to stumble on the fact that if you click on the date you can change it. I am actually a developer/baker and if I did not immediately know/see these a common user will not.