Sometimes we have found that maybe a neighbor or roommate could have picked up the package for you. If you can double check it would be greatly appreciated.
We have also experienced frequent situations where USPS accidentally updating tracking as delivered before they should and the packages show up a day or two later. If the delivery is still within the delivery window time, it may still show up. Feel free to contact us if you haven't received your package after the delivery window has passed and will definitely take care of you.