Offline Items? How do I remove/remediate them?

1P_Dave's suggestion worked for me too. I had 3 items randomly show up in Offline Items, each of them was something I had deleted many months ago.

What puzzles me is why they still existed in any form, anywhere, so that they could resurface later. My understanding was that deleted items were supposed to be permanently removed automatically after 30 days. Why weren't they? I'm concerned if 1P is claiming that items are deleted when in fact they still remain in the local on-disk database, which is what seems to have happened. That is a security risk.

Delete MUST mean delete, and if there's an error that doesn't let something be deleted that needs to be displayed to the user so they can take action appropriately.