That doesn't mean you ate more calories.

The reason the ketogenic diet works is that fat makes you feel satiated so it's easier to eat fewer calories.

You don't need to work out to create a caloric deficit.

If you were fastidiously tracking every calorie and have the hard numbers to prove you were eating more calories than your body was burning through metabolic activity and still lost weight, you should alert the NIH because you're a medical miracle.

The ketogenic diet still requires you to track calories and eat at a caloric deficit.