You can be in ketosis and not losing weight if you are eating good amounts of fat and testing anytime other then morning. Then the sticks are showing diatary fat being burned, not yours. Or you are in ketosis, but eating enough calories your body doesn't need to use any of it's stores.

It is also normal after a good loss for the body to have a small plateau where it rests. Normally people only lose 10% of what they need to on induction, and you're already ahead of that number.

What you might want to do though is get an account at www.fitday.com and look at what your eating. Alot of things have hidden carbs, or just carbs you are unaware of, such as eggs, coffee, cream, and so on.

Posting typical daily menus here will also let people give you better advice if there is any food that is bothering you.