I believe you read the same thing I did which is that not all the Poly HOTEL rooms have balconies.
DVC took over the 3 longhouses which were the expansion of the Poly resort (in the late 70s early 80s). These longhouses all have balconies (or patios if on 1st floor) and are slightly larger rooms than the original longhouses (some of the rooms in those original longhouses do not have balconies).
Tikimanpages lists the DVC longhouse descriptions under DVC not under the regular hotel longhouse descriptions and all 3 days balconies on 2 and 3 rd floors