What do you think of the shared genetic defect that prevents vitamin C formation in people and chimps? Doesn't that show common acnestry of chimps and people?
Like I say, Volkswagons and Porsches had many parts in common for years and years. All the thing you mention shows is that whoever engineered humans was not working in a vacuum. Volkswagons and Porsches are artifacts of our own engineering talents. Humans and chimps are artifacts of the engineering talents of somebody or something which was doing some serious engineering, some thousands of years ago.