CSS ghosts

Hi,
Please take the time to look at the footer at louisprefontaine.com

I tried to modify the footer, but each time I would change the CSS and footer it would add a new footer below the previous one. So you can see I tried to modify it 5 times before reverting to the old ideai (thinking it would solve the problem) but all it did was adding a new CSS ghost.

Any idea what can be the cause of this abnormal situation?

Thanks