The Create Your Own tool works by combining different ingredients together to build a tailored meal. To make sure all ingredient combinations work, there are specific guidelines on how to make your General and Refuel meals, and a limit on the ingredients featured.
The recipes in your meal plan however are pre-tailored and don't necessarily follow the Create Your Own principles. The tailoring is more complex, and this allows variety and flexibility within those recipes. For example, there may be more ingredients, different amounts of specific ingredients, or you may notice your general recipes have a small portion of carbohydrates but general Create Your Own meals do not.
Rest assured both meal options are correct. But the Create Your Own guide is kept more simple so that all meals created are accurately tailored to you.