1)
What is the significance of "ha'Ozeves Aluf Ne'ureha"?
1.
Malbim: She is Mezanah while married. This corresponds to "Ishah Zarah" (16).
2)
Why does it say "v'Es Bris Elokeha Shachechah"?
1.
Malbim: This corresponds to Nochriyah (16); she is Mezanah with Be'alim and adopts heretical mindsets.