Word 'at' in Job Section of Starbox is Too Large, Cannot Override CSS

The URL is not live yet, so I’ll provide a screen shot.

The word “at” in the job portion is too larger despite what the preview shows. Using the developer tools, I found out that if I remove the font-size info from this part of the css, then the word is the same size as the rest of it.

Here’s a screenshot highlighting the problem: https://drive.google.com/file/d/0B4mnNZ1F-EDsdThGQVZzS2Z4dmM/view?usp=sharing

CSS causing the problem:
.abh_tab_content .abh_text .abh_job { font-size: 100% !important; }

When I remove that part of the css (unchecking it), then the word “at” is the right size.

Here’s a screen shot showing what I mean: https://drive.google.com/file/d/0B4mnNZ1F-EDscGdtSzFPajVwSTQ/view?usp=sharing

However, this problem does not show up in the preview under “My Profile” of WP’s dashboard: https://drive.google.com/file/d/0B4mnNZ1F-EDsendlR0NWVGpJZ1E/view?usp=sharing

No matter what I enter into my child theme’s css, I cannot override that !important font size in the Starbox CSS. How do I fix it?

https://wordpress.org/plugins/starbox/