I'm not nearly as well versed as you all are with RCI and timeshare. What I can add to this discussion, however, is that points already deposited within RCI but not booked do not show up on the link. It does show our membership # and our name, but the deposited week/points are not there. Actual booking needed to be done via phone with MS.
Hopefully, DVCers are careful with using the system! I could have easily booked and assumed the points used were the points/week previously deposited. Had I done that, I'm pretty sure it would have charged against current points.
Definitely a good tool to see what is available within a particular timeframe.