It depends how long you spend before grading to shodan. In four or five years, those kata aren't too much. It sounds like Shogen ryu is an offshoot of Matsubayashi Ryu, as they have the same kata (fukyugata ichi was invented by matsubayashi ryu's founder, and isn't taught anywhere else). In my school, we had Wankan before shodan. Ananku and Wanshu at shodan, and Rohai and Passai at nidan.
Tomari Te, Naha Te, Shuri Te are not "hard and fast" categorizations. Teachers from all the areas shared kata with eachother, and had different versions of the same kata. Basically, there is no difference between "shorin" and "shorei", shuri, naha, and tomari...just different methods and different kata taught by different teachers. They don't fit neatly into categories. We can note differences and similarities in the karate of all schools. Some people say naihanchi was originally a naha kata. It was taught by teachers both from tomari and shuri. So which is it?
As for the original poster of this thread...I think that is too many kata to learn in just a few months. How long exactly have you been practicing, that you have learned all those kata already? But I guess each teacher has their own theories. Maybe he is just trying to expose you to things, so that you can find what suits you and start practicing that exclusively?
Learn just the moves of each kata, and then let you specialize in the fighting techniques of just one or two of the kata for the next few years?
I guess it depends on what your goals are. Karate kata are relatively short and simple, if the goal is just to memorize the patterns and perform them then that's no trouble at all, take in as much as you can...but there is a depth in even the simplest kata which need to be explored through crossing hands, and two person drills that take time to internalize and make work for you. I guess as long as you go back and do this with all the kata over the years, then learning the movements early on isn't doing any harm. Some people may just be jealous that you get to learn so many katas in such a short time, when in their school they have to train for years before seeing most of those (jk)