When you book the apartment through booking.com, under the Apartment Sun Spalato Views profile, you can find 3 different properties.
In the right corner you can see +36 more photos and there you can see all 3 properties photos mixed by booking.
When you enter dates, booking offers apartments that are available on requested dates (All available apartments). Then under apartment type you choose which one you want, for example Apartment with Balcony and Sea view...
or Apartment with Sauna and Sea View...
. . .
When you choose your apartment, you can see then it's characteristics, details and photos.
You can also click the following link for short video instructions - VIDEO