Looks like an AJAX issue on your site, likely plugin or server related. You may want to ask your host to check if everything is in order for you, else provide a link to us and we can point you in the right direction.
I found this problem. This problem is happening because you call the wrong adress image. You call: /wp-content/themes/images/ajax-loader.gif but the correct adress is: /wp-content/themes/neighborhood/images/ajax-loader.gif.
Please, send me a file with this correction and You could put this in the next updated.