Presumably the same does not happen if you view the help from the generated location. What happens if you launch the help from the server or from the Web Administrator?
I always suggest that people manually delete all the files from the server area location before they publish their output. The publish process is unlike the generate process. It is effectively just a copy an leaves all sort of unnecessary files behind from the previous publish. By publishing to a "clean" location you know that the content is good.
You may also want to delete your browser cache. This has been known to cause confusion by displaying a cached (and therefore old) file. Let us know how you get on.
Thanks again for your input.
Indeed, the generated content is correct as shown in the second picture. We have tried your suggestion to delete all files from the server and restart said server. This does the trick.