you may need to trim back the overlay a tad. it might JUST be sticking out over the edge of the wood panel by a tiny little bit, but i think its enough to do that once to hammer home the t-moulding and it presses on the overlay.
i usually apply the art, the lexan or plexi then hit the outside edge and then inside the cutouts (like buttons joystick etc.) with a router equiped with a bearing and flush cut bit. that way everything is the same size as the wood panel.