Not sure if this is where to ask this, but I've noticed people have had a similar issue as I am having with getting texts about expired messages, but I keep getting these on messages that I know for a fact that have been delivered, and got a response on. The last time this happened was this morning. The delivered messages were from 5/31, got a final text back from the person, then got several texts today about the delivery being expired on those texts that had been delivered, and received a response on.
This isn't the first time this has happened where I've sent a text, person receives said text messages, responds, I get their text, then days later I get texts saying delivery expired. Why does it do this?