Im another one who cant quite figure out the assosciation between v low carb and increased blood sugars - If I go below about 20g my sugars inexorably rise as do ketones, to the point (highest was 6.5ish for ketones) where I feel v unwell and have to increase carbs again - it then takes about 2 weeks of eating higher (40-50g carbs) to get things back on an even keel
Although I can share the experiece of the effect, sadly I cant help interms of any possible answer to the conundrum tho