Yes! Especially when it tells you, go look online, and if you see Change Reservation you can make the change yourself. I scream, No, no you can't. Even if you have the prompt, it doesn't work!
I too have done the rebook and cancel more often than bothering with calling. I hate that in the end that hurts me by keeping funds tied up waiting on a refund. It annoys me so this time I opted to call them instead. And I picked up on something I had failed to note in the past few years (since being an AP holder) there's a dedicated phone number for AP holders to call. I've always scrolled to the bottom and called the number shown there. But the other day I happened to open the AP Special Offer page and saw there is a different phone number shown. I called it and sure enough, it's specifically AP related. No idea if it is truly a different call center group but it does have a different recording. The process for changing was easier than many I've done.