I can't figure out where to report this anywhere...but in the first exercise where it is introduced, 中 is pronounced "naka" (なか) (in the audio file) but the "correct answer" is ちゆら? I'm just beginning to understand that there are two different pronunciations for the Kanji, but Duolingo is expecting me to know that when the audio is clearly wrong (at least for the answer they want), and I have no way of reporting that.
I'm Chinese and I am really confused when one character pronounced different and meaning different in Japanese. In Chinese all the characters have only one syllable and very very few of them has 2 pronunciations, even in different words the character is still the same sound. Here i can guess what it means but i really don't know what it sounds...