This morning as I was reading the group, I wanted to block a sender advertising something or another that I wasn't particularly interested in. I clicked on the appropriate choice to block future emails, but just before I confirmed I wanted that "person" blocked, I noted that I had actually chosen the wrong message and was about to block one of our regulars!
That made me think of Polly and Sunny. Polly, is it possible that you inadvertently blocked Sunny's posts from coming through and that's why you don't ever see them? There should be a way to check all your blocked senders, and if she's there, you can choose to unblock her. I don't know what email reader you use so can't help you as to how to go about that, but I'll bet if you can't figure it out, someone here will be able to help!
Just a thought, and I have my fingers crossed that it'll work.