Sections leading to random pages

For sections with multiple articles, when I click on the section from the main page I’m sent to a 404 page or it’s leading to a random page instead of a list of the topics.

Getting the 404 page here: https://codedcreative.co/knowledgebase/getting-started/
Being redirected to a random page here: https://codedcreative.co/knowledgebase/how-do-i/

The page I need help with: [log in to see the link]