I just recently installed two Gerber Avalanche toilets. I got the first one installed without any trouble and it works great. However the bowl on the second one seems to be misshapen causing the toilet seat to rock at an angle from side to side. I tried two different seats, same problem. My floor is level. I leveled the toilet bowl as best I could, Its perfect from left to right. When I check the level of the bowl from the left rear to the right front it is sloped down towards the front of the bowl, when checked from right rear to left front it is level. It also flushes differently from the first one I installed. Water does not flow from the rear rim holes as well as it does from the front. Is this a defective bowl? Or am I missing something? I haven't had a chance to talk to the distributor yet as it is Saturday.