I have just realized this also in the last month. As a diabetic go easy on the protein, the body can use only so much and then the rest spikes your blood sugar. Read this in a few places and they made sense. We diabetics are messed up.
I read in a few places also that for some diabetics when we very low carb, the liver thinks that it needs to turn up it's abilities to produce sugars and raises our blood sugars. That's what they refer to as the dawn phenomenon. Metformin is usually used to correct that.