Where'd you hear about that? <swivels antennae>
Hambly actually skirts around telling the whole story in VoI
, apart from revealing its roots as a fan story she'd written as a teenager, and pulled from the drawer when David Hartwell did a ring-around of friends to canvas submissions.
So it must be her "Starlog" interview where she revealed the whole saga. It was in a time of editorial flux at Pocket - her manuscript sat around for over two years - and the connections to "Here Come the Brides" got missed in the shuffle. Even if Hartwell knew about HCtB being featured in "Ishmael", not all of his successors realised.