When I had to do this, it worked on my desktop when reviewing Plans but on did not display the cancel option at all on my iPhone.
When I did this, the cancel button was missing. I switched browsers and it was there.
I tried 3 different browsers, no luck seeing a cancel or change option. Hopefully it returns by the time I need to. 
Anytime I have to do anything with Disney I use Incognito mode and it usually works over there…I mean even just looking at the Disney Parks Blog works better incognito. Disney doesn’t want to track our cookies I guess.
Tried that too. The only button I have is “Start Check-in” or “Update Check-in” for my real reservation. Normally I wouldn’t worry, but since I am “cheating” I am a little worried, especially if everyone else isn’t having issues. 
it’s just temporary.
You won’t need to do that. The important points are that the lead on each ADR has to be different and for the first reservation you make, don’t make the lead the owner of the MDE. But, with that in mind you can make multiple ADR’s from one MDE account. When making an ADR, you can make anyone on your friends and family list the ADR lead.
I just checked my reservations under my plans as well, and all my rooms do not have the “cancel” option. I wonder if IT is tinkering around for the halloween announcements tomorrow.
I did check the app and if you go to “room details” and scroll to the right of where the room number shows up, there is a “cancel room” button.
I found that also, but when I try it gives an error message.
Hmm me too. Weird. Can’t even change reservations either. It’s got to be some weird issue
If more people are seeing it, I’m at least more hopeful that it’s a glitch and not me being singled out as a cheater. 
Hello- Do you know ( even without the leading reservation) can you book things like carriage rides or mini golf 60 days plus 1-10 days, like with dining, or are those activities strictly 60 days? Thanks
Just cancelled my leading reservation with no issues! The one thing to consider, if you are planning a trip for 15 like me, you will have to call for larger parties. Being on hold daily as each day hit 70 got to be annoying, but we got everything we wanted! Only one CM commented on the leading reservation but I had a different group on that reservation (not my immediate family) because I was booking lightsaber builds for my sister’s family and I just said, oh yeah, we’re a big group with multiple parties…
Curious. I sent a message on the chat asking if there was an IT issue and my reply was “since it’s a room only reservation you have to call to cancel”
That clearly makes no sense as it has never been that way before. Not even having the option to modify is silly too.
I don’t need to worry about this until June, so hopefully it’s a glitch, but if they already have soooo many people calling and waiting for hours to talk to people then why would they want more people calling.
I suspect the chat person is uninformed
And the chat person told me that for room only reservations you have to call to make payments. Clearly they don’t know what they’re talking about!!
Actually I haven’t ever been able to make payments on a room only reservation through the website. Canceling though you should definitely be able to do online if Disney IT is playing nice.
I have always had to call to make payments on a room only too. They don’t expect early payments since it is due on check in?
I mean, I suppose you have to call to make payments if you want. I always just have it charge my card when I check in, so I never realized that was an option 
Still frustrating as heck to not be able to modify or cancel though!
It seems to exacerbate the issue of not enough people to pickup the phones if you have to call them anytime you want to change something. I change things constantly
That’s my guess. I’ve always called a few days before checkin to pay with giftcards.
Yes, I always called before my billing cycle to spread out costs.