Found my own fix.

edited: /etc/X11/xorg.conf.d/99-calibration.conf

reversed the Calibration section options a bit. Mine is now this after calibration:

Section "InputClass"

       Identifier      "calibration"
       MatchProduct    "ADS7846 Touchscreen"
       Option  "Calibration"   "3964 151 3843 240"
       Option  "SwapAxes"      "0"

EndSection