Well, Tommy, your B12 is marginal. So the Metanx should help that.

Blood sugar can also be affected by stress and elevated cortisol levels. Your new readings seem much better, and your A1C is pretty good too. Being ill or doing heavy physical work/exercise can briefly raise levels glucose too. You might ask for a fasting
INSULIN level next time you have tests. If this is elevated it suggests insulin resistance.

Potatoes (and other nightshade veggies) are problematic for me too. Potatoes have an alkaloid in them called solanine, and this is suspected to be problematic for some people.

Some vegetables are slowcarb and useful. Beans, legumes like peas and lentils, and Edamame beans can satisfy hunger for a long time, esp overnight. They help stabilize blood sugars for some people. Beans, Edamame beans are also good sources of dietary potassium and magnesium.

Use nuts as a snack (in moderation) and that helps keep levels going well.

I use 1/2 a Zone bar for night time snacks. If you wake up at 1 or 2am hungry, you might be quite low. Not eating then, forces the liver into gluconeogenesis and then the morning fasting levels are higher than if you ate a little something at 2am. 1/2 of a Zone Perfect Nutritional bar helps me alot with morning levels. Elevated fasting effects like this has a name= dawn phenomenon.