Slingshot Inserts

I have been riding a 2008 Slingshot Response for the past year and about a week ago I took a few bad falls and noticed that my boots became very loose. I thought it might have just been the screws coming loose but even after making sure that they were completely tight the boots still had a significant amount of movement going on. I then tried moving the boots in to a closer stance so that I could continue riding and that worked for a good amount of time until I took another bad fall and yet again the boots were coming loose. I noticed that there is some bulging coming from the board around the inserts and so I am pretty sure that the problem is there and I am just wondering if there is any way to fix this (my friends already suggested I just stop eating trash all of the time but I am pretty poor at that). Has anyone else had this problem?