My experiences at POFQ with room categories:
2013 (first stay), I booked River View. When I checked in at the desk (regular check in, did nothing online) they said they didn't have River View available and were putting me in Garden View and crediting my account (room only res, and they brought up the credit right off the bat). Turned out for the better, I got a great location in building 5, 3rd floor, facing the movie lawn, near the end closest to the "front." Very convenient to food court and bus stop. I didn't really care about the view, I booked River because I liked the looks of the buildings facing the river from photos.
2014, I booked a Garden View and requested bldg 5 or 2. Got a great location in bldg 2, ground floor, not far from the boat dock. I was facing the pool area and yes, it was classified as Garden View on the ground floor.
2015, I booked Garden View again. This time, I just made a general request for "convenient to the main building." Got a great location in bldg 2, facing the fountain courtyard side this time, 2nd floor, near the "front" end - this was especially good since I was there during the bus stop refurb and buses were picking up in the parking lot near building 3.
For 2016 - I've decided there's No Bad Place to Be at POFQ and am going in with Garden View booked and no requests. We'll see where they put me!
diskids2 - If I were in your shoes, and you really want bldg 2 or 5, I would call and see if you can add that as a request - if for any reason pool view is not available, you'd like to stay in either bldg 2 or 5 in whatever category.