I have read a few other post that people are having problems with $ showing up in their account after a Marriott purchase. Does anyone know if this has been resolved?

Also, I have several Marriott stay coming up that are LNF rates which is a pain to cancel and go through that all again just to book through the BigCrumbs portal. If I make a change to my reservation, will that be enough to get me the credit or does it have to be a brand new reservation?