Mix/Limit tweets per user

Hi, I’m loving the plugin so far. I have a question about the using the list shortcode. Is it possible to limit the tweets per user in the list? It looks like its only pulling from the last person in my list.

Site: http://retreadwerks.com/wordpressNew/new-homepage-test/

Thanks for the help!

http://wordpress.org/extend/plugins/mini-twitter-feed/