I've found a couple of things that need changes in mergeDb:
In my database there is a post which is General University Questions and is Housing and Accommodation. However when the filter selects Housing and Accommodation, it doesn't come up - when you click on the post, it says the subject is 'Accomodation' (not the housing part), so maybe it is just a simple comparison error. Another General University Questions question that is Technology and Resources displays correctly so I think it's an issue with the Housing one specifically rather than General Uni questions.
When you click on General University Questions, then click on a specific specific subtopic, then click on All Subtopics, it doesn't display any posts for me (even though there are posts in the db that should be displayed). The same happens with University Courses.
I've found a couple of things that need changes in mergeDb: