Widget containing testimonials overlaps widget underneath

Hi,

I have your shortcode placed in a widget and then another widget with other content underneath that.

When the widget containing the testimonials shortcode expands (due to there being more words in one than another) it overlaps the one widget directly underneath rather than pushing it down.

You can see this here:

http://csfbuildingcontractors.com/

Can you offer any advice on how to get this functioning correctly?

Many thanks,

Dan

https://ww.wp.xz.cn/plugins/strong-testimonials/