Had this for a while. Happens almost every day. When I finish a schedula (mostly kanji I think). In the end, there is one term left. When I click on study there is only popping up the new term intro. When I open the schedule, go to options and click save (without doing anything), the 1 term will disappear. At the moment there is one left for you to check in kanji schedule "jlpt2".
