Column Issues

I had this done at one point but my css changes disappeared, possibly after a plugin update.

I need my lists to show up as columns of instead of one long line. I’ve checked the other threads and made the changes it suggested https://ww.wp.xz.cn/support/topic/columns-rows?replies=6 but it is not working. http://muskesynergy.com/find-an-agent/

Please help as this was once working but somehow now broken.

https://ww.wp.xz.cn/plugins/simple-staff-list/