I just installed an American Standard Cadet 3 round toilet in my guest bath and even though the floor and toilet are level, there is still a good size gap at the base. Everything is bolted down well, it just seems as if this toilet has a rounded bottom instead of a flat flush bottom. Is this normal for this model? I had a builder quality Krane toilet in there that sat perfectly. I know i can caulk, but i don't like the thick caulk job on a nicely tiled floor.