Yes, that's right. The higher you start the higher you will finish, so you need to know what the "spike" was in order to work out if that was a good meal or a not so good one. Some foods like bread will spike earlier than slower releasing low GI carbs like tomatoes, so some of your spikes will be at 1 hour and some at 2 hours depending what you ate. The more fat with the meal, the flatter the rise will be. (Think hump back bridge rather than mountain peak).
If you spike at 1 hour, it isn't such a bad thing provided you are back to almost at base at 2 hours, as that is what can happen to anyone who isn't a diabetic. Its a steep learning curve! Just keep doing it and spot your trends.