I am trying to remove an a valid device from the iPad Slingbox application. It is an invalid Slingbox ID but was added from the iPad, it doesn't show via web side so I can't delete from there. From the iOS side I can add, refresh, but I can't delete. It shows across all iOS devices, but again not on Slingbox.com which that list is correct. I tried deleting app and reinstalling, but added all sling boxes connected to my account including ones that are invalid.
I know this question was asked a while ago, but in case you are still needing help removing your Slingbox from the directory, this article should help you out.