ACA and age based premiums

My small organization recently received new health insurance rates beginning July 1. Our rates went up 29%. Health insurance for me and my family (before cost sharing) will cost $32,000 per year! Blue Cross tells me that this is because of the Affordable Health Care Act which requires that all small business plan premiums be exclusively age based. I turn 65 in October and am planning on enrolling in Part B Medicare. I will then have my wife purchase individual plans for herself and our two boys age 13 and 14. This will cost $10,000 less. There is something wrong here.