Hello, I'm having a slight problem with the installation of my new American Standard Cadet 3 toilet. The holes for mounting the tank on the bottom of the tank seem to be spaced slightly wider than the corresponding holes on the back of the bowl. When I mount the tank the screws holding the tank become towed in a little bit. This causes the 1/2" head on the screws to sit at an angle on the rubber washer sealing the hole. The screw on the right of the tank dosen't seem to lean so much and seals okay. The one on the left leans 10-20 degrees and prevents the washer from sealing. I've tightened the screw as much as I dare without breaking something. It still leaks. I drained the tank and completely removed and repositioned it with the same result. Anybody else had this problem? Why would the holes not be the same width apart? Could this be a defect with this particular toilet?