So someone else has confirmed the repeated-questions bug, with screenshots. Basically, sometimes at the end of a quiz, the missed words list may have duplicates. Apparently, it can even happen before the end of a quiz, which I don't understand how, but it's possible. If you have seen this and have anything that might help me debug it let me know... Otherwise, maybe don't do saved lists until I fix the bug. I'll add a month of membership at least to everyone who's contributed.