Technician View only showing top-level help topics

I’m hoping its something I have missed when setting up nested help topics, but as per the subject, when creating new tickets in the technicians view, we are only able to see the top-level help topics, and none of the ‘sub topics’ that I have created in the system.

Its also the same on the End-user portal.

ok, scratch this, figured it out… its because I have set the top level topic as default. changing, then changing back causes the screen to refresh and display me the required sub topics.