I recently tried to subscribe to newer workshop items and delete (unsubscribe) to old ones. I have tried both through the Steam "browse the workshop" as well as ingame at the scenarios by clicking on the blue highlighted "Scenario" button below. It shows that I have subscribed to some, but they don't show up in the list of scenarios I have saved, and those I have unsubscribed to, still lie there. When clicking on subscribed items in the YOUR ITEMS tab to the left in the Steam menu, nothing happens.