RESOLUTION:
1. - Open the older version, and go to: Tools | Administer | Job Manager
2. - Click on "Migrate scheduled tasks from other versions"
3. - Select the task(s) and click OK
Please note: newer versions do have new features in them, features that don't exists in older versions, so if the task was originally created in the newer version and it uses features that are different in the older version, it may not be changed to be executed in the older version.
