The BMI chart isn't what you should be concerned about, but the BF % chart is as it will better predict the health risks based on actual fat your body is holding onto.
In an article by Josh Hillis on www.Livestrong.com, If you are an athlete or active, you are going to have more weight in muscle than the average person, and your BMI may not accurately reflect your health and fitness, or how healthy and fit you look. Many athletes have a higher than normal scale weight, despite being active and being lean. It's not unusual for a bodybuilder, football player or basketball player to have a BMI that reads overweight or obese, despite the fact that they are obviously lean and fit.
This is where body fat percentage comes in. Body fat percentage is literally measuring what percentage of your body is made up of fat. Everything else is usually referred to as "lean tissue." This gives a more accurate representation of health, fitness and leanness for someone who is physically active.