Agree 110%. The phrase 'more money than sense' comes to mind here...
It is confusing for sellers, no doubt about it. I don't know much about purses, but in the jewelry realm there apparently is a proliferation of fake Tiffany items for sale online, as I've read about this in a few jewelry forums. As I don't tend to buy newer/trendy stuff it doesn't affect me, but it does seem, as Squern says, that if companies wanted to do something about it they could. I'm guessing he's right, that they like the free advertising.
OP, good luck getting more answers. I'm not sure what the answer is myself, maybe asking support:
support@ebid.net about different brand names before listing items would be the way to go; admittedly it's a bit of a PITA, but it might save having listings pulled.