Hollie did fights for ECNWC as you mentioned. Jenn also did a few fights for them as well, but not against Hollie (at least as I can recall). She did have at least one fight against Holly at Catfighting Angels, but that is a different lady.
But again, if Jenn did fight Hollie at ECNWC it never came up on my radar. Doesn't mean it didn't happen, though.