You say not immediately so you do get events but later? If i read your last linre the task says never, is there an other task that was triggered? I always also clear an event that is emailed so i can see if an event is handeld.
Also be aware to save a task under a "service account" instead of your own, if you delete the account that created tasks they also get deleted.
Also be aware to save a task under a "service account" instead of your own, if you delete the account that created tasks they also get deleted.