The program is using "Color Member By: Product (Fill) or Product (Line)". These settings affect the member colors in the model as well as the Layout Material List colors.
To modify this behavior:
- Navigate to File > Setup > Program Settings.
- Under Colors & Line Styles, change the "Color Member By" to "Type" instead of "Product (Fill)" or "Product (Line)".
- Click OK to save the change.
- Click on a joist to see the colors change, or restart BC Framer® software.