You have a great logo - and i think that is pushing the page out of whack.
Try removing the logo and see what happens.
You might need to place the logo into the body of the website - or reduce it to make it work.
There ia s chat module called messerchat i think - i don't know how much it is but it's a dnn configured module.
I also thought that the DNN core team were doing something with chat but not sure how it works.