Scheduled update /autoclose option not working

The scheduled update for Spybot has just run. The update appeared to complete successfully. However, the scheduled task includes the /autoclose option, but the updater window didn't close until the run time limit that I had on the task (10 minutes) expired.

I'm pretty sure that the updater has closed automatically previously, but I don't use the PC that I'm using to test the beta that much, so it's possible that it hasn't and it's only been the run time limit that has closed the task.