I received an e-mail from Facebook saying that my sis Sandrajo, had posted a photo on my superwall. My sis deleted her account and I don't have a pic from her on my superwall (took me about ten mins to find that I did have a superwall btw)
agree with cazz, i often see things that i know were added days before. Also my wall posts dont always show up on notifications so i dont see them for a while. I wouldnt worry about it haysi.