What triggered expiring old backups in backup exec. 2014?

I have client with Backup exec. 2014 SP1 and hotfix 225092.

I thought that hotfix was supposed to fix the software so it would delete expired backups from USB devices.

The client has limited USB disks and I need to delete all backups off the Friday full disk each week.

They are set to only hold on to for 2 days.

When I get on the storage and check the backup sets they all say expired.

If I manually force a expire of one of them the rest go away also.

So it is like it does not trigger it so it can clear them out.

I am sure I have left it in to see if when it starts the next Friday backup if it deletes them then and it does not.

I see there is a SP2 available has anyone had any issues with it and does it help this?

Thanks

Mike