Well, it's a good thing I called back. The first CM that I spoke with today completely misunderstood what I was trying to do and almost messed up everything. We are traveling with two other groups. One friend and my wife and I each have HH Studios for 5 nights. The other couple wanted 7 nights, arriving a night before us and staying one more night after us. In order to make that work, I added 1 night on each end of their reservation, which resulted in 3 reservations for the same room type (1BR villa - not HH) for 7 consecutive days total.
The CM that I spoke with earlier today ended up setting up a WL for the 5 nights that we are there, so if it came through, the couple in the 1BR might have had two single nights in an OKW-1BR on either end of a HH-1BR! Fortunately, I called back and the second CM was actually able to secure 7 nights in an HH-1BR under a single reservation, although for one of the nights, it was the last HH-1BR available. She held the HH-1BR reservation while I went into the account and canceled all three non-HH reservations. Fortunately it worked, so all of us have a complete reservation in the HH.
It seems to me that the CM earlier today should have reviewed the transaction as a WL with me before hanging up; he never mentioned that he was setting up a WL! Ugh -- we need more functionality on our end so that we can manipulate the reservations on our own! I realize that will never happen. . .