Its just how the diet is setup. Mon-Fri Im supposed to eat almost no carbs and then on the weekend I carb up. Here are a couple links that talk about the diet:
http://stronglifts.com/anabolic-diet...ic-diet-guide/
http://www.bodybuilding.com/fun/sclark94.htm
Here is the page with the calorie formula:
http://stronglifts.com/anabolic-diet...se-weight-fat/
I also think that the suggested calorie amount is insane and just isn't doable on this diet unless you are a monster who can eat all day without getting full. I do like the theory behind this diet though because I do find that when I just do a regular bulk with a lot of carbs my waistline starts to expand quickly.
**I think that calculation on that page might be wrong though. I also saw one where it said your ideal weight x 20-25. So for me it would be 220x20-25 = 4400-5500 which is more reasonable but still tough with no carbs lol.