I have downloaded an extension (for slider) for testing on my future website. It all works regularly, apart from a small defect on the placement of the navigation arrows, that instead of be on the edge of the slide are both located on the bottom left of the main slide.

the extension author wrote me this:
" The CSS code for de arrows for FavSlider is changed by a CSS file from your template called tmpl.default.css. This is responsible for creating the arrows issue. To check this, simply temporarily change your template with a default one or disable the tmpl.default.css. "

Here's an example that acknowledgment of the problem: http://www.rusiavacanze.com/rvdir/index.php/trilocale-dx

How can I fix the problem ?