I am confused about the lining in an authentic Gustto. I was convinced that they only used a black logo on yellow/gold material for the lining (and that, therefore, that would be one way to spot a conterfeit bag). But now I've come across a couple of retail websites that feature Baca bags with a plain solid yellow/gold fabric lining. My question is: does this seem right? Why would Gustto feature bags from the same line with different linings? (Almost all of the Baca bags I've seen on eBay have the solid lining).