Feeling like a white belt again

So I went to this Hapkido class tonight and the first thing the instructor asks me is "Have you taken any other martial arts before?" I say "Well I just received my Shodan in Aikido" and he gives me this stern look and says "Well this is HAPkido". I say "yes sir, I'm just here to participate" after that the rest of the class was smooth. I use the word smooth liberally. I can't kick high, or do a middle knuckle punch, or a spinning kick well at all. I was making so many errors I felt like the first day I ever took a martial arts class. Not to mention that the first hour of class was running in place, then push-ups, then dive bombers, ect. I'm not lazy (well too lazy) but I was ready to start doing some real techniques, then came ukemi (falling). That was the only part I felt I did well in, although I got some quizzical looks with the way I fell (one knee up, the other leg out). Nevertheless, my rolls were smooth :). I was told a few times that I was too quiet when I rolled back to my feet, that I should slap hard and say "HAI!" as my shoulders rolled over the mat. I've been working towards being quiet for a while now. The beginning wrist releases are completely different, although the way they grip (not using the index finger) was the same. I noticed most movements were same hand, same foot too. My initial impression of Hapkido and Aikido is like two distant cousins meeting for the first time. They have the same family tree if you go back far enough, and a few of the same genetic quirks...but for the most part, they're pretty different.