Bad Batch of Huggies Gold

I've been having a problem with huggies gold for some time - I though it may have just been a few bad nappies, but for almost an entire bag to go bad is not on. I've been noticing that the the side lastic on the nappy seems to come undone, resulting in my baby to pee out the side of the nappy. At first glance it seemed as though the nappy was full and that could be the reason, but upon inspection, the nappy was completely dry but the lastic was no longer in place and resulted in the pee not being soaked up but running down her leg. This happened with a few of the pull-ups as well as I've then stopped buying the normal nappy, but the same seemed to have happened. These nappies are not cheap and despite this incident, I still believe in the Huggies Gold brand, but I've lost out on 2 purchases and flew through 2 bags of nappies because of the lastic coming undone. Was I an unlucky customer that got 2 bad batches? Because I was definitely not impressed!!