I went to pick up my ticket for cup game and only had my own ST but wanted two , I was told by a very pleasant dark haired girl in ticket office that I would need to come back with other book . She told me that there were plenty seats not to worry as they wouldn't sell ST seats first , so I don't think there is any need to panic over getting your own seat .
As for Chistine ( I see its spelt with a K above sorry if I got it wrong ) in main reception she is always more than helpful and welcomes you with a smile . Keep up the good work Christine ( with a K ?)
As Renegade suggests above it may have been simpler to just produce ST on day of match and voucher taken out ....Food for thought if the occasion ever arises again that the club would dare to give us a freebie.Would save staff time and money having tickets printed .