I have created my first series, added Entry rules (to match a user segment) and added a post to be delivered to those matching the rules. I must have been doing something wrong because users where moved from "started" straight to "Disengaged". I know I am missing something, but what? I am attaching a screenshot of my series below. I was so thrilled when I saw Series came out because I think the functionality is great! I only wish I could use them!