Related FAQs are auto-generated and by default are FAQs either in the same category or similarly tagged (we combine this pool of FAQs). We take the top 4 results from that pool, based on the sort order defined in the instance. For info on how to change the default sort order see this FAQ.
You can choose to force the Related FAQs to use tags or just the category by updating the setting in MyMalcolm / Settings / FAQs:
In this scenario we will then take the top 4 results from just the category or tag pool using the defined sort order.