i dont know if this issue is just on this model, or every model, but when i calibrate on my rindo, its like the hip tracker is tied to my upper chest. 

i work around this by playspace moving upwards so the white hip tracker ball lines up horizontally with the green line. also, when you calibrate, your (maybe just mine) model spawns a few inches in front of you, so you have to walk or playspace forward a little bit to line up the body as well.