I use Ver 9.05 - Gold.
In the Person screen, when I click on a child or sibling person to make it Primary, it will not move up. I have to click on one of the Primary person's tags (B, M, D, Census, etc) and exit the tag. The selected secondary person then moves into the primary spot.
I have reloaded the TMG program a couple of times but the problem persists. I have 4-5 projects, they are all affected.