The tank lid on my toto drake is not level with respect to the toilet. It tilts at an angle towards the bowl. If you look at the lid you can see it is casted at an angle which I assume is intentional. I installed my tank following the instructions and it is sitting properly on the three mount points. Is this normal to have an unlevel lid? If I tipped the tank bank I think I could get the lid level but this would be contrary to the instructions.