Khan Mobile App Not Syncing

I switch between my parents' houses often so I have to do Khan on different devices - an iPad and a PC. On my iPad, my course progress is up to date and I have over 20,000 points, but on the web version it only shows 6,000 and my courses are way behind. Is there a way I can sync progress so I don't mess anything up? I'm a bit worried because I leave the house with the iPad soon and I need to keep studying for my AP classes next year :P