In Site Preview I do not see any placeholder text (ollo chollo, etc.).
One thing I do notice is your white page background appears to be a rectangle instead of the page color and on a few pages, About Us, for example, the rectangle stops short of the bottom of the page. I would delete the white rectangles and make your page color white (drag and drop the white color swatch from the screen palette onto the page).
I would not use the page transitions. Even previewed in Firefox, they are slow and klunky (technical term). Page transitions such as these work best with very simple pages. I would use something more basic such as Crossfade and increase the time a few ticks. It will be less noticeable.
As for the code, I would not worry about this. The code will be modified on publication and any code not used for the page removed.
Hope this is helpful.
Interesting product, by the way.
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