Mine wants 2x day. I agree with you though. That one off day can throw off the average. I test at least 2x day. If something doesn't feel right or I'm trying out a new food, I'll test more often. I'm more inclined to use the doctor's advice as a guideline than the rule.

The highest (usually the first) reading in the morning is a gauge on your dawn phenomenon, or overnight sugar production. Whatever you eat as a bedtime snack (or a late meal) will either help stop it or aggravate it.

The last reading is more of a measure of the last meal eaten. For most of us on day shifts, our heaviest meal is the last one of the day. So, if this is your highest reading, you might want to look at redistributing your carb intake more equitably among your other meals and snacks to even out readings throughout your day. This should help bring down that high evening reading.

That said, I wouldn't worry too much about that daily average as it does not throw off the A1C. That is an average of 3-6 months. So, a couple off days won't matter with this one. It's the overall average that matters.

My endocrinologist looks at my DEXCOM report to see how my levels are going day to day hour by hour - pre dexcom i had a excel sheet that I entered my readings to (use to test between 6 and 12 times a day depending on if I was driving or how active I was).

I programmed my excel sheet to take all the inputed data and pull out a average for each day, week and for the month and at 3 months - use to be very close to showing what my A1C was going to be, use to be within a point or two of being accurate. Use to take my reading when I wake up, before I ate, two hours after i ate, before I drove, before working out and middle and within 30 min of finishing working out. it gave for a very rounded reading and view of my levels and gave me the needed window for how much insulin I really was needing to use on the daily.