Yes, this is a story about errors - plural - made by one person, me. I’m not going to beat myself up here. James Reason, professor emeritus at the University of Manchester (UK), and one of the seminal authorities on human error, reminds us that most errors are caused by good, competent people who are trying to do the right thing.
Reason defines a human error as something that has been done that was not intended by the actor, not desired by a set of rules or an external observer, or that led the task or system outside its acceptable limits. My errors indeed were not intended or desired.