The old icon is due to you loading Font Awesome 4 times (some of which are older calls). We usually keep it up-to-date the best we can. I'd recommend looking at the template modifications of your site and looking for the word "awesome", some plugin developers use a template mod to add in a font awesome call. Just use our styles (Style Properties -> [XB] Font Awesome).
Additionally the color, you may need to adjust here:
Style Properties: ├ ─ Social Links
In the misc box we set the color to !important on there.