I too work at one of those places and delays can happen from the extreme volume that is being processed/ the damages created by the extreme volume (specifically when places like Walmart package 40+ lbs of shite in a 10 lb box,literally), or if say Target sends someone a bottle of Tide that wasn’t properly closed or placed in a plastic bag (just in case of this occurring)and it leaks all over all of the packages that were around it during shipping, causing all the other packages to be repacked if they are even salvageable. Sometimes packages are picked up by the wrong carrier (not sure how this even happens) and are simply stored on shelves or in a specific “package purgatory ” until mgmt decides to send them to the appropriate carrier. Even priority mail or next day deliveries. I know that everyone thinks that their package is special but you have to remember that thousands of packages are being processed per shift. In the interim, actual people are being overwhelmed/overworked beginning with warehouse employees. Just a little FYI for you all.