Status badge document incorrect?

There is an article describing three types of status badges here:

support → Understanding-the-3-Different-Status-Badges-in-CircleCI-Builds

As far as I can tell the second and third types don’t work? I get a 404 for both of them on my projects and the first type isn’t very useful, since it doesn’t show the status of the current build (which is “needs approval”) but instead the status of the previous completed build which was “success”.

Is there something missing in the docs about how to get them working?