issues with tags cloud

Hello, I’m working at a page with a basic_tagcloud which I’ve called with its shortcode [ngg src="tags" display="basic_tagcloud"].
First: is there a shortcode to show show_count number?
I could manage to achieve this result overriding the default values in wp-includes/category-template.php:830 (e.g. from 'show_count' => 0, to 'show_count' => 1,). That worked but obviously hard coding isn’t the best way to work it out.
So, either someone knows a proper shortcode or suggest a better solution to modify my child-theme functions.php
Second: if I click on a tag of the tagcloud a gallery is regularly opened and everything looks fine but if I visit the same gallery a second time the appearance is messed up (i.e. instead of having 3 columns the thumbs pile up one over the other in a single column). Does anyone know why that happens and how to avoid this behaviour?
btw I find it’s a weird thing that when someone goes to a gallery via tagcloud there is no way to go back to the tagcloud page… am I doing something wong?
However I temporarily added an old style javascript:history.back() link, but isn’t there another way?
Thanks for any suggestion.

The page I need help with: [log in to see the link]