That is correct - that's by design. The metadata is only parsed out during the initial song creation, otherwise updating the file could overwrite or undo changes the user made in MobileSheets itself. I may add an option at some point to force the metadata to be updated from the contents of the file, but a user would have to trigger this each time unless I add a global setting to always update the song metadata to reflect what is in the file itself.
Mike
Mike