The Values tab lists all of the values that are currently available for the refinement. These values are pulled from the index created by the search and will not be available for new refinements until the index has been rebuilt.
Values List: The list of values in the list is the list of all values available for inclusion in the refinement. Values may be activated or deactivated by selecting or deselecting the "Active" checkbox. Inactive values will not appear in the refinement. Values may be removed by selecting the "Remove" icon.