Right--it just says "edited" and doesn't specify which field. But I think it is more confusing if I poster finds a post he made that says it was edited and he knows HE didn't do it. Since only the last edit date is shown it might get confusing if an admin edits and then a poster edits something else. But I worry that some posters may see surname edits we made as admin and then they edit them back the way they wanted them--for instance to show EVERY surname they are researching. Admins might not catch an edit on top of one they make.
I do wish there was some way to indicate edits by admins vs. edits by posters though. It may upset some posters but may also serve as a learning tool.