This post will clear it up (and yes, you are right and I was mistaken to a point, however you are not always in ketosis on the diet due to the carb-up):
Despite what anybody says, the 30g of carbs does NOT keep you out of ketosis. In fact this diet has nothing to do with being in ketosis at all(as far as ketonuria goes). The next person that says "if you are in ketosis then you are not on the AD" should be beaten with a whole wheat pasta noodle.
Triglycerides AND ketones are used by the body on this diet. When you load on the AD you are refilling your glycogen stores. Now when these glycogen stores are depleted then you start producing ketones for use by the brain and other tissues to function. That is why you load again.
Some people begin showing Ketonuria(Ketones in the urine) sooner than others based on several factors with activity being the main one. There is a big difference between someone with a desk job and someone doing manual labor as far as glycogen depletion setting in even on 30g carbs.
The lower your glycogen gets, the more likely you are to start showing ketones in your urine. There is no way around this besides upping your CHO during the week, but I have found 60g at times to still be insufficient.
I have used the strips for the past two years and have seen what effects certain things have on ketone levels so despite what people want to think or say, my research strangely enough matches the data available that I(and from the sounds of it Bizmark) have read.
Now if somebody says that the doctor told Nelson Montana that if you are in Ketosis then you are not on the AD, then I wish you the best, but you should realize that that was like 8-9 years ago and there is a bigger body of evidence to suggest otherwise.
Glycogen stores empty = KETOSIS
Increased Fat intake = Increase in lipolytic enzymes
Increased lipolytic enzymes = FFA use for energy
FFA use energy = Adaptation
Adaptation + Glycogen stores empty = FFA and Ketones for energy
FFA and Ketones for energy = MEGA fat burning and protein sparing