Right, but if you look at the numbers in your UV texture editor, it looks like they go from 0-3 in x and 0-3 in y, so if you have your UV snapshot to just take 0-1, you'll only get 1/9th (to be precise) of your UV layout. I think you can either change the range that the snapshot takes, or better yet, change your UV texture editor back to 0-1 as it is by default.