Don't worry about it is my advice. Easier said than done I know but as someone who has been Type 2 since 2006 and who has scoured the world for answers, the truth is for some of us that is just the way it is. My 'liver dump' mechanism will even dump glucose during the day if I go for 4 - 5 hours without eating. People will tell you it cant happen but for a small proportion of us, the Consultant has confirmed, it can happen.
Personally I have discovered that I need a big dollop of rapid acting in the morning to kill the high night time reading. For me that is 24 - 30 units depending on what I eat for breakfast. My breakfast of choice is the same everyday. One large slice of Lo carb toast with lots of almond butter. Its filling enough to get me through the 2 - 3 hours I need to get my BG under control. I just cant eat carbs in the morning as my body does not like it and even with lots of insulin, my after breakfast reading will be well into double digits.
I have friends with the same problem who run for an hour each day and they say it helps their overnights but I have not found any improvement myself through moderate/ mild exercise (not up to running anywhere!!) or even fasting. In fact fasting seems to increase my morning readings. If I eat a moderate carb diet say 100 - 150gms C per day, it can affect my overnight reading by up to 1.5 digits but even on very low carb (say 30 - 40/day) I cant reduce my overnight below a reading of 8.
Through trial and error what I have found is that the closer I get to 6 after a meal, the better my dawn phenomena is. For example, the nurse wanted me to cut down on my insulin use because although I have an HBA1C of 6.1, she said I didn't need to be so strict and rather than aiming for 6 after meals, I should aim for 8 (BS I think but I did it anyway). Well for the first ten days or so, I reduced down to about 65% of my previous insulin intake and lo and behold, there was little difference in my morning reading or surprisingly, my after food readings. So I was thinking huh, I really was doing it wrong. This was all well and good until I woke up one morning at 14 and for several days, my after meal readings were right up as well. Now either I was sick or didn't know it or as I suspect, my body needs that level of insulin. It took me a week to 10 days to drive the levels down again to around 8.5 - 9.2 upon waking and in the 6's after meals. I am just about to embark on a test of that theory by doing the same again to see if the same thing happens. They will tell you that rapid acting can only effect about a 3 hour period but I am quite sure that for me, daytime insulin is impacting my dawn phenomena quite substantially. Still time will tell.
Also with diabetes, you get everything sorted and then it changes so although it took me years to accept it, there is no right way. You may never have the level of control you'd like to have. VLC defi nitely helps but maybe not the dawn issue and normalising weight is a big thing too but do the best you can and accept the rest.