If one cannot complete all of the cards in a lesson in one session and returns to it a second or third time, some of the previously shown cards are shown again. For a short lesson like the language and culture lessons this is not an issue, but many of the card sets that accompany the audio lessons have close to 100 cards. I usually limit my study sessions to 1/2 hour at a time, and cannot come close to getting through all of them in this time frame. Being constantly reshown cards that I have previously worked on is inefficient, at least until all of the unshown cards have been completed.
Has anyone else noticed this and also thinks the functionality could be improved?