Is this fitting him correctly?

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Is this right?! We planned to do cloth diapers from the very beginning, but got overwhelmed so waited until all of the disposables ran out. Today. 😅 In disposables, he is in a size 2. He is 9 weeks and 14lbs. This one is Alva baby but we have a number of brands. It seems super gappy at the top, but if I go in another snap, the sides butterfly out even more than they are now. Help?!