I am using my Tanita BC-1000 from last 2 weeks now and noticed that when I take a reading from BC-1000 to the FR60. The readings are substantially different between these two when I read from BC-1000 to Healthy Edge software supplied by the Tanita. Examples are taken straight after each other: FR60 reading for the body fat is 17.5% and the Healthy Edge is 29.7%, Body weight is identical on the both, except this every other reading is different. Why these readings are different?