Backup email report sent twice

Thanks for this module, it works perfectly!
I am just annoyed by receiving email twice after a backup
- a first one that tells about DB backups
- a second one about DB + file backups.

The attached emails were sent in the given order. In this case, I have 3 active schedules
- hourly DB local file backup
- daily DB FTP backup
- daily File FTP backup
The email report corresponds to the fire up of the 3 schedules

Thanks