That second mention of Latour should be Rodriguez.
Ha, true - she actually has a LOT in common with Barbara, as they're both daughters of cops. And the original Spider-Gwen artist just drew Batgirl #48 and #49.
First and only Marvel superheroine, yeah. Carol is only past 100 in legacy numbering, not in a single continuous series - the same goes for She-Hulk. Of course, Wonder Woman can also claim the 100 issue record. It's actually several hundred, so she'll probably never be beaten.
Not quite. Being Spider-Woman was fine when she was on Earth-65. The name change came about because Jessica had been Spider-Woman since before she got her powers. Which was fine when they were in separate universes, but when Gwen started commuting to 616... of course the Spider-Gwen name for her comic was used for the same reason - Jessica had a book that launched just a few months earlier.