I don't know if this is a stupid question and I'm sorry in advance if it is. We have a 24' round above ground pool that was installed in July of 2014. We live in central NY were winters can get cold and snowy. The problem is that we can hear the steel creaking around the pool. It is especially noticeable when there are people swimming. When a rush of water hits one of the walls the steel creaks and then settles.Is this something we should get checked out or is this normal? Is it just settling?