Thanks for on-topic response!

No, have not called MarrMemRew since reservations rep's (?)error.
Will probably call AFTER stay to ask why not 60K pts. as promised on phone. Am not worried about MarrMR repealing offer as "contract" has been established, no?

Aside: am realizing some attitudes in this Marriott forum much less pro-active than other areas of flyertalk -- but, hey, all it takes are a few good ones!