That is done by design. Since the Lean Hybrid Muscle Nutrition plan is heavy on protein, without additional fats and carbs it can be tough to consume a lot calories. In order to make the meal plan realistic, everyone will be eating 1900 calories on Days One and Two of the Hybrid Diet. This is a strategic underfeeding calorie day and is the same for all the calorie plans.
For more details, please review the Lean Hybrid Muscle Nutrition Manual, pages 9 and 10.