Picking up the back foot for added emphasis, which you should be able to do on a board to move around. I've been skateboarding a lot recently, and trying to learn Ollie's and shut it, so it's a lot of jumping off your board and landing on the front foot, so when I'm not stacked or stacked on the back foot the board wants to shoot out in front of me. You can practice on a deck with no wheels just doing little hippie jumps and try landing with only the front foot down keeping your back foot up, if you can't do that than you are probably not stacked correctly over the front.
Replied on Following my previous post, last Sund...
05 Jun 00:32
Graham well as the other comment mentions on that particular wave you may just be too far back on the board in general to pull it off. While your foot should be on the tail pad for turning, it does not always stay there. I have the same issue, LOCATION, that you do. I ride small gutless slop all day too. When I'm playing around on my kids 7' micj fanning soft top, my feet (including back foot) are much further forward away from the tail. It allows the board to plain more, therefore generating more speed, and thus making the stacking easier.
If you have a bosu ball practice your stance on that with the idea that you need to move your back foot forward and backward freely. On a bosu with no forward momentum it will be more difficult to stack solely on the front foot, so hold onto a chair back or counter top and practice only being over that front leg and moving your back foot forward and backward while still maintaining the stacked front leg.