got it. the behavior is to change the title if its not different from the filename but if you have a custom title, dendron should leave it alone (even when performing a rename - if not, then thats a bug)
as for keeping name constant in all cases, if you submit a feature, we can track it on the roadmap 🙂 https://github.com/dendronhq/dendron/issues/new?assignees=&labels=&template=feature_request.md&title=