I can't speak to whether or not it's typical, as I'm not familiar with South Beach, but one reason the fat percentage may be higher than protein is because protein has 4 calories per gram, whereas fat has 9 calories per gram. The pie chart shows the percentage of your calories from each. If you want to tweak it, just look at the fat and protein of the individual foods in your log and see what foods fit with what you want and which ones don't. Good luck!
And now that you don't have to be perfect, you can be good.