Since you found out the instructors sensei , call that Sensei on the phone and ask questions of the club you found. You can always go to that dojo as well, if its in a reasonable distance. The "Master" should be receptive to questions and should be happy to assist you. If it were me 'and its not' I would ask the Sensei at your club, what his rank is, ask to see his last menjo "certificate of rank" and look for the other Sensei name, on the certificate. This way you can be sure that there is a clear path to rank/promotions within your organization. One thing you should avoid like the plague, is ANYWHERE that the instructor is not whom he or she claims to be. If they get offended by yor questions, move on !!!! Thats not the place for you. Since there are no laws or regulations governing martial arts clubs or teachers, here in the US, anyone can open a dojo and claim to be any rank they want, you can even do this. Ask the questions and don't be intimidated by the belt color. If they are offended or give excuses, RUN DON'T WALK, to the nearest exit.... And above all else, no matter where you go - don't sign any contracts, pay monthly. Your not financing a car, its karate lessons.....