Yes to question 1 - that would be building 1.
Re question 2 - the rooms that are 14xx are 4th floor building 1, the rooms with 18xx are 4th floor building 2. rooms with 24xx are 4th floor building 3, and 28xx are 4th floor building 4.
If you're strictly looking for 2 bedroom dedicated - you aren't necessarily getting the rooms with the best views...there are two facing Disney Springs on the inside of the building which would probably be the best overall, but they're right near the inner bends of the building and have other balconies 90 degrees from you. I personally actually prefer the lockoff 2-bedrooms, and request the 03 and 45 rooms that sit on the corners of Building 1, the 03 rooms in building 2, the 45 rooms in building 3, or the 03 and 45 of building 4 - all face Disney Springs very close to the water and there aren't other balconies or parts of the building in your view.
If you go with dedicated 2 bedrooms, I'd probably go with 21 and 27 as they do have the view towards Disney Springs and are very close to the elevators. If willing to entertain 2 bedroom lockoffs, I'd highly recommend 1203 or 1245, 1303 or 1345, or 1403 and 1445 - those end rooms in building 1 have the best views, are closest to stairs down to the pathway, are closest to Disney Springs, and being at the ends of the halls, tend to have less hall traffic and noise.