Why are you both thinking this was 20 miles? Did the original post get edited after the fact and says something different now from when you saw it? Here's what I see right now:
It says 40 miles left to go, not 20 miles.
But anyway, this is kind of the fundamental problem with how the driver did this drive. The very first time he looked at it was when the drive was almost over with only a very slim 6% projection of energy at arrival. As
@Big Earl was saying, always put this into Navigation, and then keep half an eye on it as you drive. When you're inside the car, you may not be aware of feeling if there happens to be a really strong headwind that day outside of the car. But the car will know. And that extra energy consumption will be figured in, and that estimate constantly adjusted, and you will definitely see if your arrival estimate is rapidly dropping from 20% to 15% to 10% to 6%. You need to do something about it earlier instead of suddenly looking at it near the end of your drive when it's too late to do anything about it.
So we can't help much since you don't have any information on what things looked like during the drive. If the energy consumption showed very high the whole way, then maybe this is totally normal, but it's hard to tell.
