1. I noticed that if I change my siggy, it won't change on my previous posts (before I had a siggy). Is it supposed to be like this?

    Reason I ask is because in other forums, all of your siggies in your posts usually change too..
  2. Your previous posts don't get a sig added if you didn't have a sig at the time of posting. Only posts with prior signatures get the new sig if you change it later on.