That one hour after reading is significant. When I have doen such experiments, eg with normal porridge, the readings after:
1 hour 14, 2 hours 8, 3 hours 5, 4 hours 4.5.
With my nut porridge the readings are: 1 hour 8, 2 hours 7, 3 hours 5.5, 4 hours 5.
What it means is that the carbs do produce a one hour spike that falls rapidly - they are not sustaining like low carb protein/fat. With a normal high carb diet it means a lot of spikes that do the damage, even if the HbA1c indicates good control. An average of highs & lows of say 7 may look like acceptable control but if there are 3 highs a day, averaging with lows of 4, it is dangerous. You only find out the dangers after years.