Apologies if I missed a master thread for website issues, but search didn't turn one up in the first few pages of results...

Myself and a companion are returning from Toronto to the US on AC, YYZ-DCA, next month, and I stupidly forgot to add our FF #s (I'm US Airways, she's United) at time of booking. Fortunately, the reservation-management page offers an option to add those, but unfortunately every time I attempt to do so I just get an unending "we are processing your request" -- just for fun I actually left it spinning while eating dinner, and came back to find it still hadn't completed. Checking the reservation after closing the browser tab shows no update to the information.

I've tried this in multiple browsers (Firefox, Chrome, Safari), and tried updating for both of us as well as just one at a time, all to no avail.

Is this a common/known issue? Something to just try again later? Or should I attempt this via some other means (phone?) rather than website?