Same thing here, with DVC as my TA.
I did the checkin within the last week. One tip - on the website, you can go back in and edit everything later. So if you want to get done quickly, do things like choose cash for onboard spending, etc. If you use the app, it doesn't give you the option to change anything.
It also seems to be common for their website to slow down and/or crash completely! If you're using the website (which I would recommend), you can just refresh the page and it'll pick up pretty close to where it left off.
It look me 20-25 minutes to check it, starting right at midnight, and I got 11:15 PAT, boarding group 5, for the Fantasy 7-night on Nov 14th. Good luck!