GE 29875GE Digital Answering Machine "net zero message" Questions

...all old messages but not new messages. If you do not have any messages, the answering system announces, "Zero Messages." User Manual: ...

...zero messages. To the caller it sounds like they are leaving a message, but I can never hear it. It sounds like two separate problems, MaryAnne44. I have the exact same machine, but don't have that ...