WHEN ARE MY RESERVED WEEKS DEDUCTED FROM MY ACCOUNT?
Weeks are deducted from your account after they are used, not when they are booked. For example, in September 2009, you booked a Waikiki reservation for January 2011. The week will be deducted from your account in January 2011.
If you have a week expiring soon, you will want to make arrangements to use it, not just reserve it, prior to its expiration date.