We've picked up tickets for
MNSSHP at Downtown Disney before....not sure about resorts?
Here is what I found on Disney's site: Ticket orders placed before midnight (Eastern Time) can be picked up the next day. Upon arrival, pick up your Will Call ticket order at one of the following ticket sales locations: Epcot®, Disney's Animal Kingdom Theme Park, Disney's Hollywood Studios or the Ticket and Transportation Center at Magic Kingdom® Park. You will need to present your Will Call certificate along with a valid photo I.D. (e.g., driver's license, passport or military I.D.).
Wonder why they don't mention the customer service area of DTD? Oh and I noticed on the check out for MNSSHP tickets that it had a link to other shipping options above where it says Will Call....it says 'see delivery option'...maybe click on that and it'll give you other options?