Amazon India — Invoice date & order number mismatch

I like to inform you that, Today (10/06/2021) I have received the
electronic water kettle which was ordered on 05/06/2021 at Amazon. The
order number received at the time of ordering the product in Amazon why
doesn't that number match with the number on the invoice of delivery
packet. I ordered the electronic water kettle on dated 05/06/2021 but why
01/06/2021 is showing in invoice as invoice date.