For crawls, the ST player caches the content for ^story based on how many characters there are in the text obj. For example, if you put "ABC" as temp text in ^Story, it'll duplicate that child a number of times to fill 1920x2 in horizontal space which may cause update delays. It's best to fill in the proper text as temp in order to get a more frequent update.
For TIckIt3/Chameleon, you can only have one Child scene with content. Use visual logic and auto-follow multiple entries.. (story.header followed by story.content)
You also need ^FirstItem and ^LastItem as your first and last child scene respectively. These elements appear at the beginning of a topic and end of a topic, to trigger and update animation on the crawl parent.