I canĀ“t figure out how the Word and Characters Learned statistics work.
I have tree different lists, which include 640 words altogether. I know that I have studied all these words (and no others). In the diagrams in the Progress page the number of word writings learned amount to about 390, and the number of characters are about 530. Still the retention rate is 94,3%.
Is this correct? Can someone explain this result?