Disable CSS didn't work

Hallo TJWRDW,

your Theme use and split the selectors for .post-title in two or more.
This means long selectors for .post-title, we set also .post-title in the Category-Post-Widget, but your Themes long selectors don’t reach our single .post-title class.

One easy/fast hack is:

add “, .cat-post-title” as pictured below

wp-content/themes/dynamic-news-lite-child/style.css in Line 1189

.widget-category-posts .small-post .post-title, .cat-post-title {
border: none;
margin: 0;
font-size: 0.95em;
font-family: ‘Droid Sans’, Arial, Tahoma;
}

https://www.dropbox.com/s/mx7dybdiyoitug2/TJWRDW.PNG?dl=0

If I can help, then describe what exactly do you want.