Pretty sure this is a bug in BackupExec but since I'm the only person to experience it, it's unlikely to appear in the knowledgebase for a while. I'm documenting this here in case anyone else sees it.
The documentation for custom filters state that if you enter 'bat' for the job name, any jobs containing the word 'bat' will be displayed.
This does not work. You have to enter the exact name for jobs in order for them to be displayed. Entering part of a name does not return any results.
Ross Smith