I'm sorry if my remark seemed to be directed at you; it was intended as a general comment addressed to the world at large, not a personal one! The Mollys website does say specifically that Nancy McCallion wrote the song, and, though she'd likely be aware of Johnny Sands and so on, there don't seem to be any identifiable borrowings so far as I can tell.

As to the quoted expressions making sense, I didn't mean that they don't, just that they don't need to, if they are what was originally written.