I just received the Garmin Index Smart Scale and after the miserable experience of setting up the scale, I stepped on the scale and I was shown about 7 different weights flashing on my scale (152 lbs, 93 lbs, 302 lbs, 257 lbs, etc) My weight is normally around 128, so none of these weights were correct, and also a jump from 152, down to 92, then up to 302 is clearly incorrect. What am I doing wrong and how can I fix this??? I feel defeated by this stupid scale.