the I like how you can select words that you know one at a time. but it does no add tthem word know. I was adding them one at a time. but when I selected the I know them all button it only added the words that where left. it added 11 words for a total of 11. I should of had more becuase I was adding them 1 by 1. so where did thay go? I hope that makes sence.
The ones that you added one at a time were added to your known words, and the unknown words total was reduced each time.