uh TuTu,
I'm fairly new to this forum but can offer this for you. 2hours may seem a little silly but the idea is that this period gives time to ascertain how your body manages the last meal for glucose et al. If you measure just after the meal then you are correct in saying what you do. If you spike then have a look at what you ate and perhaps how much of it. This may indicate that you are more sensitive to certain foods. Then try the same food a few days later. Did you spike again ?
It really is down to self management with help and support from your medical team and of course, all of the many people on here, whose advice has helped me tremendously (my thanks here to you all).
When I started I insulin in Oct 2013 I put a control on what I ate in that I had the same food for each meal, breakfast, lunch and evening meal everyday for two weeks. My BGs were, and still are variable. At my DN visit this morning they advised that this is a slow process with much trial, re-trial and some error which I look on as a learning curve.
Hope this helps.
Alan