Yes, I totally agree with EllieM that those spikes are insignificant and could simply be variations in the meter.
Home meters simply are not that accurate.
It is very tempting when we start out with our testing and new lifestyle and food choices to put a huge significance on minor fluctuations and changes. But the longer we do this, the more tests we do, and the more results we get, the more we realise that all our readings are a ball park figure, and - for T2s and pre-Ds - it is the trends that are important.
(obviously people using strong blood glucose lowering drugs need to take a much more specific view, esp when dosing insulin)
I would recommend that while you are testing and finding out how things work for you, that you try everything out several times before you make any decisions based on single readings. For example, eat the same breakfast for several days, and test each time. You will find that your readings vary, and other factors such as sleep deprivation, stress levels and exercise will factor in.
Likewise, the same evening meal, in the same portions, may give different test results after an active day, or a sedentary day...
However, as you do this, you will find clear trends emerging, and you will be able to spot those trends and make adjustments that work for you.