1 - Unfortunately there is really no way for me to summarize their argument satisfactorily, because they dive deep into all the specific cites you are raising above. Butt I think the general answers are:
A -- YES - that is their ultimate position
B -- NO - In fact their chapter is right after the main chapter on Epicurus.
2 - Despite what might appear to some that this discussion is distracting or unnecessary, I realized in recording the podcast this morning that pursuing the details on difficult topics can be very motivational. I think DEWitt makes the comment that Epicurean philosophy flourished while it was the topic of controversy, and died away when people stopped arguing about it. "Arguing about it" is a very important part of keeping it alive / bringing it back.
