I need to restore a mailbox from specific full backup from a couple of weeks ago. When using either the CLI or the web admin interface, and selecting the full backup I want to restore, I am seeing messages being restored well after the date of the full backup. How do I specify only to restore the particular backup and nothing after that full backup date?

In other words, when I try to restore a mailbox from a full backup completed on the 5th of July, the restore is successful but I see e-mail messages dated after the backup had taken place. Additionally, I'm selecting the option to create a new account for the restored mailbox.