its the correct way to adjust them though. undo the cable at the back of the handbrake (long reach 10mm socket) pull the drums off then adjust the shoes out a few clicks. try the drum back on, if its tight but still goes on then its alright if not go another 2/3 notches. you might need to grind the lip off the inside of the drum. once the drums are back on, then tighten up the cable until both wheels hold when on but still spin freely when off (normally 3-5 'clicks')