Email Notification Custom Subject Not In Notification Received

I'm running TI-2014 Build 6673. I'm using the extended option of the Email Notification capability to specify a custom subject line for the notification. I can create a custom subject line, can save it, and can see it when rechecking the extended option.

However, the subject line of the notification email once received is not what I set, but rather takes the form drive_identification Task completed successfully.

This is occurring with four different machines.

Any help would be much appreciated in setting and receiving an email notification with a custom subject line.

This is an update: a custom subject line will appear in a notification that is the result of an error notification, such as the backup destination no longer being available. However, the custom subject doesn't show in a successful completion message.

Does anyone know if this is by design or is a bug?

Thanks again for any assistance.