I think there's a bug, at least in Firefox. When you drag to remove an element from the currently active set, the "sample output" only updates after making _ano

I think there's a bug, at least in Firefox. When you drag to remove an element from the currently active set, the "sample output" only updates after making _another_ change. So if you drag to remove two elements one-at-a-time, the "sample output" will lag one action behind what you have in the workspace.