My friend recently renewed her SoCal AP and added parking. When we arrived at the park yesterday and realized that the SoCal pass was blocked out, we figured we would upgrade her pass to the Deluxe without parking (that was less than getting a blockout day ticket; plus I have parking on my Deluxe pass and we usually come together). The cast member at the ticket booth (and the lead) both stated that if you have a pass with parking you must upgrade to another pass with parking. The lead wasn't able to clearly explain why this was the case and I couldn't find anything in the AP terms and conditions that restricts this kind of upgrade. Seems to me that if we were willing to pay the difference to upgrade to Deluxe it shouldn't matter whether or not we have parking on the pass. Would appreciate any thoughts on this. Thanks.