Or, at least I did in whatever la-la land that MapMyRide lives in.
This is utterly ridiculous. In fact I would say it's downright irresponsible. Had I not known any better, I probably would have used this information to justify a "reward" meal of some sort, thus completely obliterating any progress I'd already made.
I know that most sites exaggerate the number of calories burned, but this is by far the most egregious example I've ever seen. Sigh.