You can reorder the list below. When you do the sort order will be displayed in the box below
You should be able to reorder the list by dragging. The new order displays below the list when you release an item. If you scroll the list down a bit it should still let you sort correctly. (Note that it won't scroll for you as you drag; that's not part of this test). Dragging an element that contains a radio that is selected to a new location should keep the radio selected when it's dropped.