Two arms and a spray at the top. Having to lift both sides detracts from the versatility. Sometimes the bottom rack has a taller than usual item, sometimes the top rack does so you lower that side. I guess I'm spoiled but I do have the higher priced models and that is one reason they cost more, they are more verstile. This is my second KA in 24 years and both had that ability.
I guess it is cheaper. I don't know, I never looked at how they were made. Of course, one handle is better than two, but there is no reason to have both sides on the same plane. Check yours further and it may work that way.