Helen said she was at the house cleaning up just 1-2 days after Andi’s death when the box was delivered. Miles said that his “puzzle guy” was barely able to make the five boxes in time for delivery, implying a tight turnaround, and it’s obvious from seeing the boxes that they couldn’t have been made and delivered in just a few days. I don’t think it needs to be stated that the delivery was already in motion when Andi sent the email.