My time record is not showing up correctly

Hi! My name is Izzy and I am a fifteen-year-old homeschooled student using Khan Academy. My mom (who is my teacher) checks my time record frequently and it only shows a fraction of the time I have spent doing an exercise. Sometimes I have to spend upwards of an hour to get it to show I had even done thirty minutes of a topic. It is starting to vex me because I know I am doing the work and have the computer history to prove it... but the Khan Academy records are not showing up and it's making me spend unnecessary time doing extra work on exercises when I could be doing so much more! Please let me know if there is a way to fix this!