Not sure about how levels work (in vocab) I know that some levels go down when you get a word/grammar phrase incorrect, but when I study lists the mastery levels don't go up sometimes even if I get them correct
the way i understand it, you have an overall mastery level, and a mastery level for each vector you’re studying. when you get quizzed for each item depends on the specific vector being quizzed, while the mastery level for the item as a whole gets calculated based on all the vectors you’re studying.
Also, if you get one correctly when you do a review too soon, the level won't increase. The idea is it shouldn't count when it is just from short-term memory.
I have noticed that as well. you stop getting mastery points and exp from lessons after a certain amount, a day. it seems like a healthy way not to encourage cramming in as many as possible, despite being free to do so💭
I also learned that if you forgot a term or haven’t seen one before during a quiz, clicking “I don’t know” is better than guessing, cause it doesn’t set you a step back in your mastery level, then get to see the answer and try again