I have Better Touch set to filter out accidental touches. It's better, but my thumbs will always find a way to hit the Macbook touchpad and jump my cursor all over. Are there any other settings I can adjust to mitigate this very annoying issue? Thanks.
Unfortunately the BetterTouchTool accidental touch filtering can only affect BetterTouchTool gestures.
All the mouse moving, clicking etc is handled by the system and can not be influenced by BTT unfortunately.