Unexpected page refresh for non-logged user

I installed chat plugin and opened a chatroom here

http://www.endzone.it/2013/02/22/live-chat-2013-nfl-scouting-combine/

As far as I was logged in as admin user everything was ok, but when I logged out to try Twitter and Facebook login options I realized the whole page (and not the chat frame only) refreshes at the given interval.

I’m using a twitter-bootstrap-based framework, if this helps.

Please, be also advised that class="row" which is used by plugin developer conflicts with framework standard rules and the message div is partly hidden as it takes a margin-left:-30px declaration usually assigned to “row” class.