Pa@okw95, guess I was mislead by your statement then. Whether the checkout date itself is a weekend or not is irrelevant to the reservation window. Apparently you didn't mean the checkout date itself falls on the weekend, but rather the 11/7 month window for that date falls on a weekend.
I thought you were saying many people checkout on weekends (This is very common because a lot of people book Sun-Thu night stays.) This is what I thought you were referring to by your statement "This happens all the time".
Because of the offsets between any vacation date and the same date 11 or 7 months earlier, the chances of the reservation window being on a weekend when member services is closed is only 2 days out of 7, or 28%, or not exactly 'all the time'.
Nevertheless it's mostly semantics. If the 11/7 month mark for your vacation falls on a weekend, the member simply has to wait until the following Monday.
I agree that there's no sense in making part of the reservation on Friday and the rest on Monday for a simple OKW reservation that does not include a hard to get accommodation.