My golf shots on the course are usually fairly good, but when I go on a golf range with those green mats I seem to hit a lot of thin and fat shots, shanks and snap hooks! Don't if this is caused by me hitting the mat slightly behind the ball and the club head bouncing off the mat or something. I'm almost getting to the point when I stop practising on the range because it saps my confidence! Does anybody else have similar problems, and any suggested cures?