Replying to Salomon Bindings and sling shotting!

I have a pair of Salomon 912's a pair of pilot 810's and some other 810's. I ride X Wave 8 modified boots, and take a look at ur heelcup. Where the top of ur heel piece on ur boot is suppose to meet the heelcup of the salomon bindings it doesn't. It only sits on two points on the outside of heelcup itself, therefore allowing ur skis to pre-release when spinnin' and then you slingshot them off! anyone else have this trouble? look at ur bindings and tell me if they are the same.