I am not seeing any definitive window patterns that would support the duo studio count
For the duo studios, I looked at the foot prints of the villas in the plans and the visible dimensions of the villas in photos and when I was there in person last month.
There are
three places where I believe they have duo studios.
The
first is marked in green in this photo (below) from ehh.
Its size is comparable to the duo studio at DLH, and obviously smaller that a normal studio.
There are 7 floors with this villa.
Those are the 7 Lagoon/Theme Park view Duo Studios.
The
second place is across from the first.
Inside the circle below.

There are two villas, side by side, equal in size to to the first.
On the first floor, in these plans, this space seems to be for storage or commercial use.
The villas start on the second floor, with 6 floors having the villas, equaling 12 there.
These are also shown in the center of the photo below from blogmickey.
Notice how they are inset from the normal villas that they are next to, due to their smaller footprint/size.
As these are facing the monorail/parking lot, they will be standard view.
The
third place is on the south end of the tower.
Look at the last row on the far right of the photo below, also from blogmickey.
Those are also inset with a smaller footprint/size.
There is only the 5 (5 floors) facing the monorail/parking lot.
Standard view.

.