Why does the R value of the wall, roof or floor I selected not match the R value shown on the report?

You probably have a wall, roof or floor selected that has a name which does not match the actual R value of the assembly. See screenshot below. You can name a wall anything you want. The actual R value that will be used in the calculation and will show up on the report is highlighted in the screenshot. You will need to select a different assembly with the proper R value.