The panel in the door is suppose to float. It is normal and there is nothing you did wrong. If you make a lot of doors it would be best if you get some rubber spacers to put on each side of the panel to absorb the shrinkage evenly. It might just be the wood you used may have been seasoned good enough and if dried better wouldn't have shrunk as much. As far as putting brads in it, only put the brads in the center. Otherwise if panel shrinks some more the wood can split where you put brads in it. I would just paint the raw wood and let it be.
Last edited by Steve Neul; 04-16-2012 at 05:28 PM.