Problem with Projects slider

Hi,
I have a problem with the ‘Latest projects’ slider on home page. If I e. g. configure 7 projects (aech with a featured image) the slider itself works fine. But if I click on an item the zoomed featured image has the caption ‘Image xx of 21’ (instead ‘Image xx of 77’) and if I scroll left or right within the images all images appear more than once.