Below is a update from the NZ Post YouShop Team re. the recent parcel delay issues...
"We’ve seen an increase in enquires about delayed parcel processing at the US warehouse. We have completed a review with our US warehouse provider and found the majority of issues relate to parcels being scanned and/or delivered incorrectly. The US delivery providers have been alerted and are monitoring the situation. The US warehouse team is also working with the delivery providers to locate any mis-delivered items.
If you receive a parcel delivered notification from the US carrier; but your parcel doesn’t appear in your YouShop account within 3 working days, please raise a delivery enquiry with your Merchant and contact the NZ Post Customer Support Team."