we had our dinner and all of our tables on the main, upper level. if your party is much bigger (we had ~55 people) i think you have to have some tables on another level. i can't remember exactly what pictures you're talking about, but here are some that maybe can explain where we had our dinner ...
i do have some pics from other weddings as well that had tables on different levels. when you have a bigger party, they can't all fit on that upper level - i think my party size was about max
this shows the upper level where we ate, and the picture was taken from standing down on the beach. there are more tables to the left that you can't see.
here is a side shot - the photog was standing off to the right if you look at the previous picture.
here's another picture of the dinner setup - this one taken from down on the beach again, but from the opposite side as the previous pic
a night time view of dinner ... it looks like we're signing our certificate. i just love this picture!