Unfortunately the bamboo curls outward in essence making the shape that of |( where the pipe is the iPad and the parenthesis is the DodoCase.
I've sent a request for some sort of reasonable way to fix this, as it's been this way since I've received it. The reply was they would send me new rubber feet and it's doing what bamboo does naturally. I stopped using it the day my iPad slipped out of the case and hit concrete on the corner making a nice nasty dent.