Your technique is logical, so it must be right :).  "Carbohydrate" is shorthand for carbon and H2O, and  sugar is made up of carbon and water, so it is a carbohydrate (CHO).  Since your blood sugar control is good, obviously you should keep on doin what you're doin.  However, you should be aware that some carbohydrates are actually healthy for diabetics!  This would be soluble fiber- it is a CHO, but is not broken down into sugar as much as other carbs.  In fact, soluble fiber slows blood sugar rises after meals, and increases satiety as well.  This is why, for CHO counting, you can subtract 1/2 g fiber from the total carbs in a food.  So all diabetics should eat more soluble fiber, which is found in oatmeal, beans/peas, nuts, fruit skins (apple. orange), and veggies (carrots).  And since weight loss is generally healthy, this is one reason why docs tell EVERYBODY to eat more fruits and veggies!