Client backup - remote ftp server

[R.W]

Hi Guys,

[situation]
A client uses Client backup to backup all of his domains, the backup is then automatically transferred to his remote ftp server.

[problem]
When the client opens the backup manager of one of his domains, he automatically finds backup files.
Can you explain why Plesk creates them here?
I can imagine Plesk needs the separate domain back-ups te create a master client backup file, but the files should be removed when the master client backup is ready ( I assume ) ?

Thanks for youre reply's