When you calibrate do you hold the stylus in a natural writing position or are you pointing it at a 90 degree angle? Touching the calibration points how you normally write may help.
https://www.mobileread.com/forums/sho...hlight=writing
https://www.mobileread.com/forums/sho...hlight=journal
https://www.mobileread.com/forums/sho...d.php?t=137466