OOh, weird, going through the dvcmember site does get you stuck at the page that links to the FAQ.
member extras>>
perks&discounts>>
tickets&tours>>
Save on Select Walt Disney World Annual Passes and Premium Annual Passes>>
page that links to FAQ and goes no further.
At disneyworld.com, even though I still use a different login (same email address, but on dvc I use a nickname, not the email), they somehow managed to work it out that my account should be linked to the dvc account. Nice of them. So when I sign in and go to mydisneyexperience, then to My Profile, then to About Me, I see my "affiliation" as DVC.
When I go to Parks&Tickets, and click on the Annual Passes link and choose the normal AP, 1 adult, I see:
Annual Pass
for Disney Vacation Club Members
1 x Ages 10+ ($425.00/pass)
$425.00
Tax
$27.63
Subtotal
$452.63 USD
...over to the right. Add to Cart, and get the same info.
One more thing to try would be to clear all cookies, cache, and history, then log in again. Check your profile on disneyworld.com, see if your DVC affiliation is there, see if it works for you.
If it doesn't, or the affiliation isn't there, I would think you're not going to be able to do this.
BUT. If you've ever read Cheshire_Figment's ticket information sticky thread on the Theme Parks page, you know that one can buy a ticket, even one from a discounter like undercovertourist.com, then hold on to it. When you're ready to renew once your pass expires, take it to the parks. Enter a park with it. After that (that day, the next day, etc, anytime while it's still a valid ticket), go to Guest Relations and upgrade it to the DVC AP. (Cheshire reminds us that it's not a DVC discount, but the DVC price...just a word thing, really, but it also goes along with their pricing charts)
As long as the CM does it by the book, the CM will first "bridge" the ticket to the current price of that ticket, and then charge the upgrade from that now-current-priced ticket to the DVC AP.
In that way, you keep your discount. If you buy a normal ticket now, even if (especially if) you buy from a ticket place where it's discounted from disney's prices already, you can still save that money, because the dollars between what you buy that ticket for now and what it would have cost at the time you are using it should not be charged you.
Make sense? If not, see his sticky thread.
