This is really annoying: 
  
1. I start a new plan.  
2. I choose "American Casual" style. 
3. I want to alter all exterior walls from the style when I start designing. In this style, the default exterior walls are Green3 Siding.  
4. I navigate to Certainteed, Siding, Vinyl Siding, Vertical Siding, Cedarboards Insulated Board & Batten 12", Colonial White. I select it, hit Ok, and it's showing as the default. 
5. Now I go create exterior walls. They're all Green3 Siding.  
6. I go check the defaults again; they're board & Batten 12" Colonial Whit. 
  
What am I doing wrong?