@Irish, we have noticed a sequence when my boy will take, say, 3 oz of milk, and keep the same, then another 3 oz 40 min later and keep the same BG, then take another 3 oz 40 min later and go up 80 mg/dl (when his carb sensitivity is about 4.5x, so he should go up about 20 mg/dl).
We have seen this so often that I am almost ready to think that there are moments when people are hypersensitive to carbs.