Fastballs

I was wondering if there is really any difference (other than grips) in how you release the fastball variations. My 4 seam fastballs do what i want them to do, sometimes they will tail away from a lefty. But my 2-seam, sinker, and cut fastball really dont move around all that much (maybe 1/2 an inch) and of course i cant just throw a four seamer as hard as i can everytime (it will work with a good change but mine is average) My coach says im doing everthing right but i think im not releasing the ball right

Deceiving the hitter with late movement on fastballs is something i think would really help me out in getting more outs ( as of right now i am getting lots of fly balls and getting more earned runs because my outfield sucks and a couple of k’s here and there)