Your indicated mileage is ALWAYS 59.5 kwh times miles per kwh.
If your driving style, route, conditions, always equals 4 miles per kwh, you will always get 238 miles of range on the meter after a full charge.
If your driving routine gets 3 miles per kwh, you will always see 179 miles on a full charge.
From your statement, I can tell you are getting 3.1 miles per kwh.
3.1 miles per kwh tells me either:
You use some heat and/or air conditioning, or,
You accelerate faster than average, or,
You drive faster than 65 mph, or
Some mixture of all three.
