Usually you want to splash your ball and the sand out of a bunker, but when the ball is buried this will cause a skull, so in this situation you need to use your sand wedge to dig below the ball
For downhill lies reposition your club and body so that your stance is parallel to the slope your ball is on
The ball will always go in the direction that the clubface is pointing at the moment of impact, the face overrides the club path, and the left hand is what controls the clubface, not the right hand