Hi Rabbie and Alice,
My guess would be that the code that is being used is coming from Option II of the guide, and not Option I. The code in Option II will only work correctly if the announcement bar is enabled.
If the announcement bar is not enabled, then it might create the behaviour that you are seeing. Could you please make sure that you are definitely using the CSS and Javascript from Option I of the guide, and not Option II?
Please keep in mind that this tutorial is strictly for the Debut theme and will not work for any other themes.
Let us know!
Sean