Yep - UPWO on Friday could be real interesting.

The warm up stretch is built into the exercise - that is why the first set is at a level of 5. You don't want intensity there at all (and that's one mistake I made pretty consistently on Monday) - its purpose is to get the blood flowing and the muscles limbered up and warm. So I'm not concerned about the pre-exercise stretching. But I agree with the post exercise stretching concern and, no, it's not part of his program. I don't see how adding it in at the end can hurt or slow progress - but who knows?