When I need "vanilla" tickets, paper or e-tickets, COOL/E-service has never failed me. After I purchase, I call the Elite line and arrange seating (or confirm) just to be sure I'm in the system.

If there's ANYTHING out of the ordinary (voucher, use of miles, intention to switch flights, companion, etc.) I walk to the ticket office down the street from my office, printed cool fare in hand, make them match it, and accept whatever special stuff I have.