I’m having a problem which causes Unity to import some of my bones in reverse, but not all of them. For example, I have a character who’s head rotates around the neck, but the thighs rotate around the knee. I don’t know about you, but if my joints worked like this, I’d be staying home, away from the rest of the world a lot.
When you select the transforms, unity takes the middle point of all objects and their children that you have selected.
When working with characters this is not very useful so you should click on the small axis triangle in the toolbar. The gizmos will then show the actual transform position instead of the center point of the selected objects.