For the moment it is only possible to show the preview of 5 articles in each section in Knowledge base. If there is 7 article then the costumer has to click on a section then he or she is able to see all the articles beneath that section. I think 5 is very less for the preview. It would be ideal to make 10 title of the articles to be shown on the preview. Please increase the number of articles which are shown on preview for each section from 5 to 10.