Andrea, don't know if this will be helpful, but thought I should mention it.
It all really does come down to a simple principle from physics, that diabetes hasn't an exemption for: Conservation of energy.
If you burn more calories in a given period (day, week, month) than you consume, you will lose weight. Period.
So, when you are having trouble losing, it's simply because you are eating enough calories -- no matter the source -- to meet your energy needs.
Just like dosing insulin, measurement and precision will improve your results. The most effective and successful way to lose weight is to precisely measure and record total calories eaten each day, and adjust that going forward based on your weight loss results.
My advice would be to count very carefully and then calculate based on weekly numbers. I.e. if you ate 10,000 cal in a week and lost 1 lb, and that was your goal, great! If you gained a pound, dial it down to 9000 and repeat. Find your energy equilibrium while functioning ketogenic, then play with things to find out how many calories while functioning in ketogenesis will result in a loss of a pound in a week.
Once you've obtained all this information, you can predictably control your weight.
I speak from experience on this (not the ketotic diet, but the rigorous methodology to characterize weight dynamics), and it works beautifully.