Responsive Grid title/link display problem

Hello,

The plugin is exactly what I needed, very simple and effective.
However, in the Responsive Grid option I have a problem with title display (or link – text displayed on top of each container in a link colour, the text is corrupt).
See my demo page:
http://www.unitedrefs.com/demo/

Where does this come from and how do I fix it?
Thank you for your help.

https://wordpress.org/plugins/advanced-recent-posts/