Okay, I bought the book about a week ago, and am on my 3rd of 4th day of RTK. So like, the first day I did about 40 kanji or so, and when I reviewed it on Anki, I had like a 91% retention rate. The next day, when the review for those came along, it took me a while to recall the stories to write the kanji for the keyword, but I still managed a 88% retention rate. A few days later, and my retention rate keeps dropping. It seems like *every* kanji I remember takes a while to remember, because I have to think of the story in my head, and my retention rate keeps dropping. Is this normal? o.o