chunhoff

This seems like a really stupid question but I can't find an answer anywhere. I have the RP-8000f ii speakers and in my basement, the back legs are a half inch shorter than the front legs making the speakers shoot up at a slight degree. This seems to be by design unless my floor is truly that sloped. I guess my question is this by design or is my floor truly that sloped? Should the speakers be perfectly level or have a slight upward trajectory? They are perfectly level in regards to stability or side-to-side but they definitely angle up. Appreciate any input in this as the wife and myself had a friendly argument on how they are supposed to be so I would like to be right for once!