It's been apparent for a while that the user name added to the commit message is not precise: it appears to often add more names than were actually involved in the change. With the incremental export, this becomes even clearen. In this case it even lists a person who hasn't worked on the project for a while:
https://github.com/BlackFoundryCom/gs-cjk-rcjk/commit/e6278c3c55446a41d8325e4b698aba3bdda59a12