Does being in Ketosis mean that your body is definitely burning body fat, or does it just mean that your body is burning fat, period (which could either be fat from the food you've eaten or could be body fat)?

As an example... If i was to eat loads and loads of food, but it was all zero-carb (like meat), i would put on weight because i'd be eating far too many calories. Would a Ketostick still turn purple because all the calories were from fat or would i come out of ketosis because some of the fat i ate was being stored in my body?

Over the last 2 days the ketostick has been a lighter shade of purple, even though i've been well under 20 carbs per day and have been eating about 8x my weight in calories (about half what i burn, after exercise, according to fitday).

I've just finished the first 2 weeks of induction, nearing the end of week 3, and the only foods i've added back in are Humous, Peanuts and peanut butter.

I should stress, though, that all 3 of these foods are treats and i don't have them every day. Even when i do i stay under 20 carbs.

I don't know whether i'm still losing weight/inches because i only weigh/measure myself every 2 weeks and i did it last week. I don't like to do it more often than that otherwise, one day, i'll get disappointed when i don't lose any for a few days.