I don't think this is a instance of a bad speller. I spelled it for her phonetically "C as in Charlie, A as in Alpha, R as in Romeo, O as in Oscar, L as in Lima, E as in Echo." at her request. So she knew how to spell it, and didn't. I did the same thing with my my email.
Honestly, I am not sure if the misspellings will prevent me from getting my tickets, we are told to bring the credit card that was used to the event when come as the document with the misspellings and the credit card will serve as our id to pick up the tickets. Since the names on the document are not the same as on the card, this may well prevent me from getting the tickets.
And yes, she is the only one who books tickets. I was at the site using their archives this morning and asked the archivist about the different departments at the site. There is only one person in the events ticketing department and that lady also works on grants for the site ( misspellings here can make or break your grant request.)