This from the Rick Steve's tips:
• There may be multiple e-ticket confirmation codes for your itinerary. If you have a roundtrip ticket, issue both the outbound and return trip at the same time. If you have multiple trips within France for which you need to retrieve print at the station train tickets, we strongly recommend you print them during one session at the kiosk as all print at the station e-tickets for travel in France need to be issued from the departure station in France.
I have two separate trips: Gare du Lyon to Avignon TGV, and Avignon TGV to Paris CDG. The crux of my question: Should I be printing both tickets at the same time in Gare du Lyon? I would actually prefer to do this.
My confusion comes from the fact that Gare du Lyon is the departure station for a one way booking, and Avignon TGV is the departure station for the return to CDG, also a one way booking.