This can sometimes happen if a customer accidentally orders two boxes, however, most of the time this happens when you place a one-off order for a date that is different from your subscription date, but you forget to cancel your usual delivery slot.
If your usual order date is not skipped, this will default to a chef-selected box being chosen for you. Please see this article for more information on our chef-selected boxes.
We hope you can make use of your additional box this week, please see this article for help on what ingredients can be frozen if you need a bit more time to use them!