The winter cover that I bought for my 24 foot pool which is 27 foot around does not fit right. I cannot get the whole thing to lay across the water and drape over the ice inhibitor floaty thing...Is this because most 24 foot covers are made for a 48 inch pool wall. I let water drain down two inches below my return, but now that seems like the water is at least a foot if not more below the top of the pool...Should I go and get a 27 foot cover or did I do something wrong?