For as much money as the dishwasher costs, the bottom rack is really bad! Once you slide it out to load or unload it, it falls off the track and is very difficult to get it pushed back into the dishwasher. How hard can it be to design the racks to glide in & out easily? When the rack is full of dirty dishes it is almost impossible to push it back into the dishwasher! Has anyone else experienced this?