Kangoo/Citan is just a rebadging : it is the same car with another front-end. So it is normal to link them (and the only Citan on the site has France as origin country).

What do you mean by adding/removing models?
If you mean making a list of known rebadging, you can but it will be much more useful to do that when we will have a place to input the info, when the new site will be ready