We've had our Intex Ultra 18 x 52 up a week and a half, a few days ago I noticed a creaking sound coming from the top of the metal frame. The creak comes from all sides but is more frequent on one side. Upon looking closer at that side I noticed that one of the top rails was shoved past the plastic knob thing where it goes into the t-joint so that rather than leaving a few inches is maybe half an inch away from the t-joint. I dont know for sure if this is the cause but the creak has me worried. My husband says there isnt any way the plastic thing is holding the pool up but am still worried. Anyone else have this experience?