A small mistake in the first line in the section Why create another library for C++, since many libraries exist?: “There are plenty of libraries that exist make it easier to make software…” is obviously incomplete.
Do you mean that it should be something like this?
There are plenty of existing libraries which make it easier to create software…
That would indeed read a bit better.
The website exists as a github repo: https://github.com/openframeworks/ofSite
So you could either file an issue on there, or better yet, you could contribute the fix. You can find instructions for that here: https://github.com/openframeworks/openFrameworks/wiki/Examples-Contribution-Process-Flow or here: http://openframeworks.cc/learning/08_other/contributing/