You can also program the pre-warming function from the car display to come on at a specified time

Hi all. Can someone please explain to me, is something wrong with my car or what. So, after charging it shows 199miles, i go on this approximately 40mile commute, on the motor way I go 60-70mph (which is most of the travel time), When I get back, the journey/ trip computer shows that I have done like 78is miles but I have around 70miles left. Should I not have enough battery to go on this commute twice?

Thanks guys