Replying to Box feature help

Hey ladies. I have been having trouble with the box feature and my not so new skis. When I learned box I had diff skis. They were 153 88 racing rentals. Now I have k2 remedy skis which are 163 92. Yesterday I was at Big Boulder and they had an extra long box feature made up of like 3 long skinny box’s. Not much of a angle to them on the slope but I keep going off the box mid way and to the left. How can I correct this. I’m not turning my skis and I’m pretty steady when I ride. I have no issues on a single box. I’m not advance by any means and I’m def a scared my cat.