I just installed a Toto Drake CST744S. It appears that their is a diamond shaped ridge where the water line should be inside the bowl. When I flush, the water fills this area about 1/4 inch deep. After flushing the water line settles about an inch in 30 seconds or so. It sits at this settled line. I've read here that this indicates water settling over the weir. Because of this, there are areas of the porcelain that are exposed causing soiling issues during use. I have to clean the toilet nearly every movement. I researched this toilet extensively before purchasing and this does not seem normal to me. Can I get feedback please. Should the water sit below that ridge exposing the horizontal portions of the porcelain?