Lis,
You understand it correctly. The dedicated 2BR units are ALL at the top of the U.
1Br+Studio units make up the rest of the U, so you odds of getting an ocean view from a 1BR unit is better than a dedicated 2 BR unit. Only the top (3rd) floor will offer a good ocean view however, the second floor may be obstructed by trees and the first floor is not high enough at all.
When we get a 2BR unit there, we always request a lock-off.