now it works fine ...
That's great!
But there is still a little bug: the thumb no 9, 13, and 23 is not correctely focussed like all other thrumbs ...
Images #9, #13 and #23 have a different aspect ratio to the other images in your gallery. They are very long and thin. Image #9, for example, has dimensions of 275 x 768. If you compare the thumbnail for image #9 with its corresponding main image, you will notice that the entire width of the main image is displayed within the width of the thumbnail. However, to create a thumbnail with the dimensions you use, the only way to do so (to get a square from a rectangle) is for JuiceboxBuilder-Pro to crop the top and bottom of the image.
JuiceboxBuilder-Pro does not allow you to position the focus of the crop (it is always the centre of the image) but you could create your own thumbnail images if you like (in an imaging program such as Adobe Photoshop) and replace any existing ones in your gallery's 'thumbs' folder.