If you have a representative acting on your behalf, then your correspondence goes to them. So some people who have lawyers, their lawyers will get the PPR and all other request. I have been in contact with another member that it happened that way as well.
Also, for the member who said they sent a CSE to ND as the sponsor, don't be surprised if you dont hear from them, or you get a generic privacy statement back from them. Unfortunately, unless you are your spouses representative, ND is legally not allowed to tell you anything anymore (stupid I think). Due to privacy laws even as the sponsor you are pretty much cut out of this process after the initial CPC-M approval.