Inconsistent/missing metadata

Some repo files contain different metadata. When using the same method of retrieving file metadata, one file will return author_email, author_name, authored_date, committed_date, committer_email, committer_name, created_at,id, message, parent_ids, path, short_id, stats, status, and title. The other file will return only committed_date, committer_email, id, message, and path.