Re: normal readings
It's absolutely pointless to test your blood sugar ten minutes AFTER you eat! The best way to determine how your body is reacting to carbohydrates is to test AM fastings a few times a week, and then do some post-prandial tests (2 hours AFTER a meal, start the timing from when you begin the meal, not when you finish.)
Also, it's very hard to guage anything from a high-fat meal, as fat slows the absorption of carbohydrates. You'd get better information if you test after a normal meal which is less than 25% fat to total calories.