I began as a student in a school under the US Tang Soo Do Moo Duk Kwan over 14 years ago. That was the original organization that Hwang Kee appointed Jae Chul Shin to preside over. When Shin left in 1982 to found the World Tang Soo Do Association H.C Hwang, Hwang Kee's son, took over the USTSDMDKF. In 1995 they changed the name of the federation to the US Soo Bahk Do Moo Duk Kwan Federation in honor of Hwang Kee and his original school name and to coinside with the Korean federation they claim. I think they also did it out of spite to the Chinese, but that is opinion. Soo Bahk Do is the style, Moo Duk Kwan is the school, but it is all Tang Soo Do. The World Moo Duk Kwan is the new name for the Korean Soo Bahk Do Association. They are one in the same. They oversee all of the Soo Bahk Do federations that teach Tang So Do in the world. That name change was to unify the Moo Duk Kwans under a common name without using Korea in the name to prevent fractionalization. Hwang Kee's system is known as Tang Soo Do, he taught the Soo Bahk Do style, in his Moo Duk Kwan school.
Under the H.C. Hwang federation I achieved 4th Gup. After that I studied Jujitsu (1st dan) and Tae Kwon Do (5th Gup). I took a 6 year break to go back to college and start a family, but I just returned.
You are right though, USSBDMDKF and the WMDK should not both be listed since one is a part of the other. I have changed the choices.