How to add a front porch - newbie here

[Katalyst777]

You skipped a step from my original reply, but that's okay.

Don't change the Pitch in the Build Roof dialog when you just want to change one roof plane, that affects the whole structure. (You do NOT want to select to Ignore the 2nd Floor for your situation.)

Instead, open the front railing's Specification dialog, and change the pitch on the Roof tab there, and make sure to get rid of the (D) in the field or it will reset back to your Default value for the roof pitch.