Credit to @MMiller_WMF - there are two problems with sort order filter options.
(1) The result set for the default filter selection - 'Awaiting for review' + 'Submitted date (oldest)') is loaded correctly but the sort order filter 'Created date (newest)' option will be displayed instead of 'Submitted date (oldest)'.
(2) Select any combination of filters - reload the page (the browser reload) - the sort order becomes 'Created date (newest)', but the result set is still for the previous sort order selection.
(3) (betalabs specific) Reloading AfC page will load NPP page.