Front Porch Roof Issue (when porch does not run full length of house)

[adkbri]

It is creating an attic wall, but the it creates actually extends in through the main roof. Interesting though, if I change the pitch of the main roof to 8/12 (the pitch of the roof over the porch is set to 3/12), it actually is more pronounced (see the first attached photo). Very strange is what happens if I select that wall in the 3D view. Notice the odd triangular shapes that get selected (and that the part that is just showing the wood surface is ignored in the selection).