I just installed an ebikekit and got in my first test ride. 36 v li ion battery, 500 watt rear wheel geared motor. The displayed mph decreases based on my pedaling speed and goes to zero when coasting. The odometer appears to do the same. I was riding on pas 3 and had a decent boost while pedaling. I like the kit except for the inaccurate mph, and the average mph as well. Is this normal? Or do I have a setting that needs to be changed? Thx.