I was confused because of this post:
http://www.disboards.com/showpost.php?p=43812641&postcount=8
which claims they stayed in a Pres Reserve unit in Tower 3. Is that just a mistake?
Yes, That would be a mistake. Presidential and Presidential Reserve units cost the same amount of points to "rent" for owners, but the deeding and way they are inventoried are different. For non-Wyndham owners, and those who aren't really familiar with some of the quirks in the ways Wyndham does things, they may not realize the different since the units are virtually identical.
In General, Wyndham breaks things down as follows. These terms are used throughout the Wyndham system.
Standard suite - A basic/standard unit. (There are no "standard" units as WBC)
Deluxe Suite - The unit has a whirlpool/jacuzzi tub. (all "regular" units at Wyndham Bonnet Creek are 'Deluxe' units)
Presidential units - Use more points to rent than Deluxe units, and generally have upgraded decor, furnishings, and appliances.
...these are all part of the "standard" Wyndham inventory which anyone can rent if they have enough points.
Presidential Reserve - The units are identical to the "standard" Presidential units. The difference comes in how they are handled within the Wyndham System. A Presidential Reserve unit may only be reserved by members who have reached Presidential Reserve status. (I believe there is even unique Deeding of the ownership interest at this level). Resorts which are part of the presidential Reserve program have a set number of units which are set aside as part of this program. These units are held and "reserved" for the Presidential Reserve members to be able to rent exclusively. This allows members with this status the freedom to still have Presidential unit availability much closer to their travel dates, however, within 60-90days (i believe), or once somewhere around 85% of availability has been reached, the remaining unreserved Presidential Reserve units are added to the general inventory of the resort and available to be rented by the General Membership.
Unlike the VIP Program which you've heard people mention, the Presidential Reserve program is an actual Deeded program, meaning it's benefits are much less subject to change than the VIP program. In order to join it, you must purchase 1,000,000 Wyndham Points, at Developer pricing. At that point they can take you existing contracts and basically trade them into a Presidential Reserve deed for the 1,000,000 points. Obviously, since you've also exceeded all the VIP level tiers, you also get the VIP membership status perks as well.
Worth noting, since the Pres Reserve program does use seperate deeding, This is also why at this resort all the Pres Reserve units are in tower 6. After the building is built (or actually, once they start selling it), they cannot change the building's point total. Since you are selling each person what amounts to a fractional ownership of the building, if they changed the value of that building, such as changing "deluxe" rooms into "Presidential" units, then you would be in essence changing the value of the existing contracts. You saw some of the complications involved which this whole process with AKL DVC when they needed to reclassify some Savanna View rooms due to complaints about how the view was obstructed or not worth the points. What Disney ended up doing is they basically juggled the points around when they built the 2nd Lodge building by under-valuing the newer building to account for the changes they needed to make to the original.... thereby keeping the total point value of the property the same.
This is probably much more than you (or anyone here) was interesting in or expecting, but it should hopefully at least shed some light on the whole process.