When attempting to restore a database that was backed up using a Full / Log / Duplicate schedule to a point in time, the last backup set available for selection will only be available from the duplicate backup.
Workaround: Restore the database using the duplicate backup set
A hotfix is now available for this issue in the current version(s) of the product(s) mentioned in this article. Refer to the Hotfix link under Related Documents at the end of this article to obtain the hotfix needed to resolve the issue.
Backup Exec 2012 Rev 1798 Service Pack 3 (TECH205351).