All the overlap is actually inside the seam allowance and you will not see it once it is sewn into the quilt. I agree with katier825 - once you trim up, that tab will get cut off.
I used this method to make over 300 geese for a border. If you are making a lot of these and strip piecing them, I found better results by cutting the small 4 squares a little larger(maybe 1/4 inch). It gave me some "wiggle room" in trimming then up.