You're looking at a confluence of two problems. One is that drop-shipping directly from Chinese manufacturers has become so cheap and easy (because of an international-postal-rule exemption that has been discussed here before) that everyone's doing it. Including the manufacturers themselves, some of whom I'm pretty sure make up the brand names literally at random. It costs them nothing at all to make up a few dozen brands, each presenting the product in a slightly different way, in hopes that one of those presentations will catch a few more eyes. It's basically the same incentive structure that gave us junk mail and (even more so) spam email.

The other problem is "review washing". Some vendors do the "bait and switch" themselves, but there's also an actual market for Amazon listings with good reviews attached. All an unscrupulous vendor has to do is buy one of those and change literally everything that goes into it, from contact details to the actual product. It's like if you could buy the right to a best-seller book cover, replacing the content for books already in brick-and-mortar stores with whatever you want. That's why sites like ReviewMeta and FakeSpot are absolutely essential for anyone shopping on Amazon nowadays.