One small section of mine is about thatmuch lower than the rest. (The one place I didn't get to put anything under the 2 posts.) If you just filled your pool in the last few days, expect it to settle a bit more before it's done. (Mine started off only about 1", then went to 1 1/2" over time.) Somewhere there are photos on here of a way to jack up the post and slide a paver or something under it. My husband wasn't willing to take the risk of breaking the posts, so mine will be slightly off until fall, when we store it for winter.