Why are redelivery requests ignored?

I changed my tracked deliveries to be redelivered tomorrow, with more than 24 hours notice. Did this for 4 separate deliveries and all 4 of them were attempted to be delivered today.

What's the point in this redelivery functionality if it doesn't even work?

There's been 3 recent occasions where I've requested redelivery and they've only paid attention to it once. What's the point in this? Am I doing something wrong?