I've been selling a bunch of stuff and shipping media mail and 1st class. Everything has gone quite well and even the media mail packages are getting there quickly. Until now. I have one that has taken a week and then today, the day it had been scheduled for delivery, it switched from out for delivery to saying it was being held at the PO per customer request. I certainly didn't request this and found it odd that the buyer would've requested it while it was already out for delivery. So I look up the exact text and find the explanation. Since the latest hamstringing moves to the PO, if someone hasn't been able to deliver the mail before their shift ends, they mark it as being held per customer request and then deliver it the next day. Hopefully that's what happens and they didn't lose it like yours but today was the estimated delivery date given on Ebay. I also now have another package that has been "out for delivery" the past 12 hours. I might have to take a selling break if things are going to start getting iffy with shipping.