Delivery Dates Incorrect

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On the Dell website I am informed that the latest delivery date is 10th June.  Howerver I have received an email from DPWorld that it will be delivered tomorrow (5th June)  asking someone to be in all day to receive it.  No option to change dates or specify an acceptable time window.  Why the difference and why do I have to be in?  Is there no option to redeliver or collect?

This is the email sent:  

Dear MICHAEL, Your Dell Order is scheduled to arrive between 08:00 and 18:00 on the 05/06/2024. Please arrange for someone to be there throughout this time - as we cannot be more specific about the time of delivery. As your order is already on its way we regret it's too late to change the following details:          1. delivery date        2. delivery address        3. order details You can track your package, simply by clicking on the following link:  Sign In | Dell Your invoice will arrive separately within the next two weeks. This is an automated email that cannot accept replies. Please reach out to Dell Customer Care for further assistance. Thanks,Dell.