caption are for the items and not for the slideshow: it is important since only in that case they are all equals. That a pure coincidence.

You can read the header for that section: "Clicca sulla gallery per scorrere le immagini fullscreen con le didascalie" - means "click on the gallery to scroll the images fullscreen with their captions". Every caption must be assigned to one image, as in the original (check the source page).
Moreover there is a timestamp that must not be removed for every image in the caption (this is removed prolly because has the same classname of the main date object in the page; I also had to manage that).