Being out of level no more than 2" is fine, if you are only a quarter then I say that is awesome. My first pool was out of level a bit, the second time I tore it down and put it back up at my new house I used a rotating laser level and it was perfect. Having survived a few winters, and with frost heave and everything, I doubt it still is, but I haven't looked. AGP are meant to float I would imagine, which is why you should never allow your deck or anything solid to mount to the pool if it is set on footings.