OK that site is an apologist front for some "being fat is OK" group.

Yes, if you go strictly by height and weight you will get skewed readings for athletes whose bodies have extremely high muscle ratios. A legitimate reading of the condition of a person's body would need measurements with calipers to asses the percentage of body fat as well as the size and density of their bone structure.

With that, don't waste your time on some overpriced bowflex. You'd get better results with a bench and free weights or even a health club membership.
205 at 6'2" is not fat but it certainly could be out of shape it just depends where you carry the weight. Since no one has any idea of your body type its hard to say since that weight could mean different things. On Link its easy to say that the kid is a pudge and he needs to work out instead of playing Nintendo. On you it could very well be that you are a big barrel chested guy. If that's the case you need to start running and cut back on fatty foods. No more large dinners and no snacks. If you are in bad shape you are going to have to start out doing cardio 3 times a week for 30 minutes. Then increase that by 5-7 minutes every two weeks until you are no longer winded by the exercise. After that I would add a 4th day and add some weight training.

If you really have been stagnant for longer than a couple years I would recommend not getting into strenuous sports until you are in better shape or til you talk to your doctor. You'd be more likely to hurt something and that would set you back for at least a month. Get in better shape by running (or biking or swimming) for 6-8 weeks and then play the sports you enjoy. But above all else change your diet for healthier alternatives.