Just got switch toeside wake 2 wake today but 3/10 I land real heavy on my back foot/leg. Mid air the tail of the board goes way down causing me to land heavy on the back foot/leg. What is causing me to do this?

Usually if you're landing heavy on your back foot it means you're taking off too heavy on your back foot. Also, make sure you're keeping the handle close to your hips and both hands on the handle.