Netbackup eject tapes

Eject from or re-insert into library does not change the pool. 
It only changes the location.
When the tape is in the CAP, you need to inventory the robot and select 'Empty Media Access port..'

Your tape is in Scratch pool because all the images on them have expired. 
The expiration date is determined by the Retention Level selected in the policy schedule.

If you still need the backups on the tape, you will have to move them to another pool and immediately start with import to prevent tapes from being overwritten.. See  http://www.symantec.com/docs/TECH43584

NetBackup Vault option has a separate manual: http://www.symantec.com/docs/DOC5192

Please take your time to go through this manual to understand the concepts before you configure the profile to select images and the eject function (skip duplication step if you don't need that).