The majority of these sentences don't fully tonicize the 5th scale degree of Rast with an extended Nahawand emphasis, but rather pass downward through Nahawand to a resolution on the root tonic of Rast. The same types of melodies are shown on the Rast Pathways: Nahawand page (also linked above).
(See also the Other Ajnas page for an explanation of "Husseini," with more sentences examples.)