LCHF takes a while for your body to adapt to, you can't start on Monday and expect non-diabetic BG on Friday.
Even when it is adapted, you can still get blips if you have a cold, infection, period, declining oestrogen and other hormonal stuff.
Stress can put BG up too. Have a row with Significant Other and BG can easily go up 5 points.
Also, what other people can get away with eating, may not be the same as you, that's why you should test after eating. They can be as smug as they like about eating porridge, toast and a 15cm high pile of bacon but remember, high blood glucose is merely a symptom of diabetes.
The lower the BG the lower the risk of complications, but normal or near normal BG doesn't mean that diabetes is cured or even in remission. The important thing, is to lower your insulin level.
High insulin levels cause insulin resistance and insulin resistance causes your pancreas to pump out more insulin to try and overcome it. When your body can't overcome the resistance and clear the BG, that's Type 2 diabetes.
Don't forget that LCHF is moderate protein. According to the World Health Organisation, we only need 1g protein per kilo of bodyweight daily. Excess protein can be stored as fat if your body thinks it's had enough. Protein can be insulinogenic too, I suggest Googling for the Insulin Index. Mostly it's similar to the Glycemic Index but milk for example is insulinogenic because of a couple of milk proteins and also contains the milk sugar, lactose.
Your body may still be trying to use carbs, you may be sneaking a treat in here and there which will keep you out of fat-burning ketosis, you may be eating too much protein or not enough fat.
One size doesn't fit all and you have to let your body have what it needs and restrict what it doesn't in quantities suitable for it.
I don't eat any root veg, bread, pasta, grains, cereals, processed foods, juices or smoothies and very little fruit. There nothing in fruit that you can't get in a range of vegetables - and I mean range. I would like to be able to eat rice, popcorn and Green & Black's chocolate ice cream but long term I know a healthy body is better than any amount of ice cream.
You have to learn what works for you, gradually. Try to do it all at once and you may get overwhelmed.