Start with the serving.
The nutrition panel usually describes one labeled serving. Check how many servings are in the package and compare that amount with what you actually eat. The labeled serving is a reference amount, not a personal instruction about how much you should eat.
If one serving provides 180 calories and 9 grams of protein, two servings provide 360 calories and 18 grams of protein. This is useful information, not a reason to feel guilty about eating two servings.
Use the ingredient list for another kind of information: ingredients generally appear from greatest to smallest amount by weight. The front of a package cannot tell you everything about the food inside.
FDA guide to serving sizes