It appears that when we changed the ticket price we failed to change the need to have a SphinxCon ticket in our TicketSpice ticketing system (which is awesome BTW).  So ticket buyers were being asked for their SphinxCon ticket #.  That issue has been resolved.  You don't need a SphinxCon ticket to attend Axacon.

Remember, there are SINGLE DAY tickets now!
A weekend ticket for Axacon is $50.
You can buy your tickets here:
More coming over the next few days! Alec