I agree, "sugars" should be added under the carbohydrate section, right there with "fiber". I have just been leaving it off, but it would be nice to track this.
DISCLAIMER: I am NOT an expert in nutrition, fitness, or exercise. Any advice given is only meant to be helpful based on what information I've gathered, and should not replace any medical treatment or any other true advice you may get from another source. Take it with a grain of salt, and then log that in your Foods tab!