Thanks for this. I happened to log into my account over the weekend and noticed tours were available. It thought is was a system glitch (a good one for once!) since I am 30 days ahead of when I could reserve.
I, too, thought it might be a problem; however, now I wonder if it is intended to give SS a more information on what is popular, and thus, a longer lead time to add tours. At least that's my positive spin for today.