The home page http://www.wtf.org/site/about_wtf/intro.htm states only 188 nations listed in the governing body which is the body that issues/regulates/recognises the kukkiwon qualification.
Yes because they do not include the WTF governing bodies that are members but do not issue Kukkiwon certificates like Spain and Mexico ( I beleave) for examples. This governing bodies are members but they issue their owns certifcates that are not the kukkiwon, if the student wants them have to requested in additon to the one that they are receiving, a don't know what are the other countries that do not issue the Kukkiwon certificate and are WTF members but I know about Spasin and Mexico for example.
Until I know there are 200 nations tru their International Olympic Committees register with the rights to the WTF. That a particular member body can stay in probatory and not listed like the case of the Republic Dominican that they are in probatory for an excandal of corruption with the goverment of the Republic thats could happen. The WTF body in Republic Dominican mix the organization with the Politics people and let use it for Politics thinks, that could happen. But I do not know you have to ask these inquiries to the WTF Administration and let see if they could answer you.