Sooo much better. I think you can even replace the normal you're using along the second border. It'll enhance the pattern along the outer border, which looks cooler. I suggest rectangles.
sounds like some of your uvs are to close to the uv space border... mubox needs space to bleed... sometimes it moves uv shells into the next uv space in higher levels if they are to close to the border... try to scale the uvs down..
Oh, I totally forgot about Poser. But Poser doesn't bring that much features to get close to a real artist. Yet. DeviantArt is a good example. I wonder where the borders are. Are there even borders or will we all become the same?