Analysis and Macronutrient Percentage

Today I used my macro-nutrient totals in grams, multiplied them by the amount of calories they equate to (4/9/4), then multiplied them by 100 and divided by the total calorie number given.  This should have resulted in accurate percentages of fat, protein and carbs corresponding to the percentages at the top-right-hand side of the analysis page: 29/42/29 respectively.  Instead, they came out as: 31/47/30.  This means one of two problems is inherent in the equation:  either (1) Calorie Count does not accurately count calories, and I've actually consumed 8% more calories than the number given; or (2) I'm not accounting for something, like a non-digestible portion of the food that Calorie Count screens out and I don't know how to.  While the first seems unlikely, the second also seems unlikely as I can't possibly think of what could account for 8% more calories.

Anyone got an idea??  Note that Protein was disproportionately further from the mark provided in the analysis than were fats and carbs...

I have observed this too and have presented the question/problem in the Announcement 2: Revamped Analysis thread as have a few other people.

Thanks man, I'll check it out.