Listing Query Strings Problems – Software / Download Theme

We are having issues with getting the right listing query string for our pages.

When we add a listing ‘carousel’ using… [LISTINGS cat=’155′ orderby=’post_title’ order=’desc’ show=6] it also shows other categories NOT included in the “155” category.

We even tried to use the slug or cat name. Can someone offer some listing strings for us to use to show only certain categories, or listing items in category?

We like many non-coder people are very confused on how to use listing strings, and the explanation pages shared are very overwhelming to understand.

Thank you.