I'd say you are lucky based on most of the reports on the dining reservations forum.
I've personally experienced receiving email confirmations for a reservation cancelation other than the one I actually cancelled, multiple times. Calling in a panic reassured me that the email was incorrect.
The website is terrible and malfunctions constantly. I don't have high hopes that it will get better any time soon.
I'm looking forward to X-Pass, but I'm hoping it's targeted at a limited audience so it can actually offer an advantage besides not having to rush to FP machines at rope drop. An open free for all system won't offer much beyond what they have now (and maybe less if they tier the rides so you can only FP one per category), and that's fine, but I was hoping for something that significantly changed the way we do the parks.