[Steven Zahm]

@ Raffaella

Where did you put the CSS? I do not see it? You did put it in the theme’s custom CSS area right?

Try adding the !important flag, like so.

#cn-list .chosen-container .chosen-results li:before {
    content: "" !important;
}
#cn-list .chosen-container .chosen-results li,
#cn-list .chosen-container-single .chosen-single {
    font-family: Georgia, "Times New Roman", Times, serif !important;
}

I tested it on your site and the selectors do work. Like I said I can not find where you adding the CSS I gave.

Hope this helps!

ps. You should use the category list OR the category drop down filter, not both.