I was able to upgrade both mine and my husband's ticket, I just had to do them separately since they're individual tickets, so I had two tabs open, one for mine and one for his.
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I hope a more satisfying solution comes up.
I apologize that you had issues with the site or the promo code. From our viewing position, all VIP transfers available went into 'pending' status within 30 seconds after 10:30 a.m. PDT. Some tickets did get released back into the system after 15 minutes had passed, and almost immediately reentered 'pending' status.
I certainly understand how anyone who was unable to get a ticket could be frustrated. We'll of course do our best to ensure that all guests, regardless of being VIP, have an enjoyable time at Fan Festival 2014.