I just started using the Index scale, and it seems that the body fat is being calculated entirely off of weight. I have stepped on the scale, gotten a measurement, stepped off, drank a few glasses of water and stepped back on. Both weight and body fat % increased relatively the same amount. also, the weight graph and the body fat graphs in GCM look identical. Has anyone else had similar experiences? I would like to use the scale for body recompostion, but it seems that the body fat will change the in the same amount and direction as weight does.