LO has always used pampers Snugglers (tried Huggies but he leaked out of every last one and Up and Up but we didn't love the smell) We have never had a single problem with the Pampers until about the last three weeks. LO has blown out his diaper nearly every single time he has pooped. We tried going up a size but to no avail. He is always leaking out the legs and occasionally the top. Any suggestions for fixing this? Do we need a different type? Better fit? The diapers seem to fit well now so I am at a loss....help!