My attempted joke may have fallen flat. If so, sorry.
My wife is frustrated by a delivery too. She has a yarn order coming UPS that has been in the local warehouse for several days. That distribution center got hit by about 20 inches of snow just after it arrived, so nothing moved for a few days. 4" of show creates havoc here. We are cetainly not set up handle 20". Then we had Valentine's Day. There is an overload of deliveries, maybe some perishable ones of high priority.
From your thread, I will now change some of my advice. Instead of just warning people to avoid ordering chicks and hatching eggs around postal holidays, I'll probably start warning about Valentine's day and Mother's Day, periods when the postal and delivery workers may be busy and shipments delayed.
This probably does not address your question, but your thread got me to thinking.