I owe you a big thank you for persisting and helping me. For some reason, this doesn't work when you pick Person ID as the first (main sort) field in the custom report and then export to CSV. If the Person ID is, say, the third, fourth, etc. field in the report it works just fine. I never imagined that field sort order affected my being able to get the Person ID on the same output line as the name (when exported to CSV). Just needed someone to tell me otherwise so I'd try it in a different order! Thanks!