Gradebook Categories and Settings not backing up/restoring

Gradebook aggregation settings and categories are lost in a 1.9.7 to 1.9.7 course backup/restore.

Steps: Add categories to the gradebook and change aggregation methods in the gradebook course settings. Backup the course without user data. Restore the course to the same site. Gradebook categories do not come over to the new course and settings are back to their defaults.