Bests & Worsts Reviews from Amazon

I have one of these that i purchased a year ago. I have five cats, they all love the thing, so I saved my pennies so i could order three more. I ordered three of them a few weeks ago, and I got them from Amazon in two separate shipments. The first shipment, containing two units, arrived quickly but with not what I expected. These first two perches came in smaller boxes, unassembled, and with very thin, cheap plastic PVC and plastic wires connecting to the suction cups. They are really poorly designed and i'm really disappointed. One is still in the box, but both are going to be returned. The third perch arrived a few days later in a large, flat box - fully assembled, and with strong PVC pipes and strong metal wires connecting the suction cups. It's the same model as the first unit I purchased over a year ago. Must have been from a different manufacturer. So, my question... Why is Amazon selling an item and distributing product from two very different manufacturers?? If you buy this, be careful if your unit arrives in a box about 14"x7"x3". It's a piece of junk, and there is a much better unit available from Amazon. Both units have a label that says DRP-SUNY-BLT6 Sunny Seat. But the good unit is in a box that is 24"x14"x1.5". Picture of good unit (large box) and bad unit (small box) are attached. Good Unit - 5 stars. Bad Unit - 0 stars BE CAREFUL!!