The Failures of the USPS

So I have received all of the component parts for my Gundam Build fighters challenge except for the actual main body kit. Apparently, it took less than a week for it to go from Japan to New York city. Then it took 8 days for the United States Postal Service to get around to sending it to New Jersey from which it will now make its way down to me in Miami. My hatred of the USPS goes back many years and is no secret. The part I really don't understand is that at the same time a separate package, also from Japan, arrived in New York city on the same day, and that managed to get to me last week. WTF?