I have to say that I don't understand the dilemma. Your picture looks correct. Are you talking about the 1/4" above the point? If you didn't have that, you would cut off the point during assembly. Are you talking about the dog ear? I just trim that off before assembly.
Recently I bought the Easy Angle Ruler and the Companion Ruler for this type of geese construction. They provide a flat top on both pieces so the alignment is really easy and dog ears are reduced.