I’m still not sure how the Family First Party allied with the Greens, certainly seemed to be party suicide though, from what I have read.
Not really surprising - Family First is broadly speaking a conservative party, but on a couple of issues, such as education and health funding, it is on the left wing, because it believes these policies will benefit ordinary families. They do have some common grounds with the Greens, but it's also in their interests to support the idea that the larger minor parties can successfully have a role in Parliament.