Ringlord, I believe you were merely making the point that having three teams in an age group and them being forced into div3 is unfair, not that having the three teams in one division was a 'feat'.
Having cleared the air of prejudice, I'm retty sure any high-ranking member of your club could provide you the incredibly obvious answer: Western Magic doesn't have an ABA Men's or Women's team. Ergo, the club isn't entitled to nominate teams for whatever division they see fit.
Unless things work in your favour and it saves Basketball SA scheduling issues, expect to have three div3 teams for the Summer season.
Also, you should already be aware of this, since was exactly the case over the past Summer season for your Magic U14 Girls - funny enough, you had three teams in div3 then too!
One more point: I've coached against the group in U14 div2 currently, and there's no way they would be in the top half of div2...