Pegasus toilet design flaw

This toilet has a definite design flaw. But I'm not completely sure whether there were also installation problems as well. The installers did not seem to know very much about flaperless toilets. When you 'twist' the handle to dump the reservoir on the Pegasus 1.28, water splashes out of the air intake holes at the top of the back of the tank, runs down the wall and on to the floor. In my case, it only splashed out of the right side, apparently because the installation is not level. The only solution the installer could come up with was to lower the water level in the dump tray. The result is that the toilet flushes with about 1 gallon or less of water, which is not enough to flush much of anything properly. Also, this solution lowers the level of water in the bowl, bringing it dangerously close to the 'vent' hole. If it goes below that, sewer gasses will come back up and be released into the room. In order to flush solid waste, it requires about 8 flushes. Not exactly a water saver. To their credit, Home Depot has agreed to let me choose a different toilet as a replacement. I would not recomend this toilet to anyone.