And the money would be going directly to Disney. So why wouldn’t disney refund?
This is the fundamental misunderstanding that people have when they book through Costco or any other TA. Disney
cannot under any circumstances whatsoever refund your money without the TA asking them to.
Period. End of story. It is
not your reservation. It is the TA's reservation. If Disney were to refund you, they would be breaking their contract with the
travel agency and they will not do that. If it's in the penalty phase, penalties are assessed. It's up to the TA as to whether or not they'll make the guest whole because Disney is not going to do it. It's not Disney's problem, it's the TA's. This is hands down the most frustrating thing about working with guests who book through a TA. They usually only do it for the OBC or the cash card and then are pissed that it means they have to go through their TA for certain things or that Disney isn't going to do this or that for them.
If the guest is double booked through Costco, catches it, and it's outside of the penalty phase then they can just call Costco and cancel and get a refund (it's important to note that refunds with
DCL are not usually as instant as people think, they can take a while so that money's being tied up). This leads me to believe the double booking thing happens much more often because the only reason I would ever get involved is because it's escalated because the res is in the penalty phase when the guest notices. Knowing how many times I had to deal with it just makes me shudder to think how many times it's actually happened.
As to how it happens, I'll try to explain the best I can. Have you ever submitted a post to a forum and your computer/internet/forum freezes and it looks like you didn't post so you post again and it double posted? Same kind of thing. It doesn't book the same room twice, it books two different rooms. It has to do with Costco's website infrastructure and how they connect into DCL and other travel companies (this is not a DCL specific problem, but it does seem Costco specific because I have never seen it happen with any other company and it's happened enough times over a long enough period that it wasn't like a momentary problem that they fixed). Less common was having a guest call Costco, book over the phone, call back because the phone got disconnected or because they wanted to switch rooms or something and book another reservation because the agent they spoke to didn't think they had already booked (the times those happened though the guest figured it out right away and it got sorted, but Costco is the only agency I ever saw that happen with). I know it doesn't make sense. It doesn't make sense to me that sometimes my printer doesn't work when I didn't do anything differently or that the Disney site will sometimes decide to not let me do online check in and show me the Seven Dwarfs instead. Computer systems don't always make sense.
As to why people don't notice until after penalties kick in or even until they get to the port? I don't know. Why did I have a guest book months in advance, get their documentation, book shore excursions, and then show up at port on the wrong day thinking their cruse was a week earlier? People are dumb and don't pay attention. Some people just have so much money that they don't notice the extra money being charged (these are problems to aspire to, lol). (Seriously, this was always my first reaction: How do you NOT NOTICE you're paying for 2 cruises? Clearly, you don't work for an hourly wage. Is this how trust fund babies live? lol) If you want to know how a guest didn't notice, all I can say is you have clearly never worked as a cast member, lol. Not noticing paying for 2 cruises doesn't even break into the top 25 what-the? things I've seen guests do. It's not even a blip on the crazy guest radar.
Double booking is prevented if Disney can tell it's happening, usually by
Castaway Club number. So if you were to go to the website and try to book yourself for two rooms with the same name, it's not going to fly. Castaway Club numbers (which are a unique identifier assigned to you internally even if you haven't completed your first cruise yet) are the only way for Disney to tell that a guest is double booked. If a TA books a Tom Smith born 1/1/70 and then books another Tom Smith born 1/1/70, the computer isn't going to do anything about it (a cast member would if they caught it, at least they would look into it and see if all guests are the same, the address, etc.) because there's more than one Tom Smith born on 1/1/70. TAs are also allowed to book with slightly less info than a regular guest is booking directly because it's assumed they're going to get the rest of the info later. It's actually pretty rare that a TA initially books with a guest's Castaway number unless the guest is on top of things and is insistent the TA book with it.
I hope that addressed all the questions. I don't come to the forum as much as I used to, but if people have questions I'll do my best to address them. Here's a post a guy made about this same issue happening with Royal Caribbean booked through Costco:
https://costco-travel.pissedconsumer.com/costco-travel-website-double-charged-me-20160910916405.html It's the best explanation I've seen of the issue by someone who directly experienced it. ETA: Here's another more recent review of someone being double booked on a cruise. In this instance Costco refused to refund them:
https://costco-travel.pissedconsumer.com/cruise-booking-nightmare-201807031294935.html.
When I left DCL, I left with two rules for myself for booking cruises:
1. Never book through Costco
2. Never pay early
It's like someone working at a meat packer and therefore becoming a vegetarian, lol. You see things that make you cynical. Doesn't mean I don't get that my view is different than the average person's.