Recently updated my site to v2.1 yesterday and V2.2 today and on the checkout page the Paypal checkout icon/option is duplicated twice.
I have disabled Paypal gateway from Woocommerce options and the icons are removed, reenabled the gateway and checkout option is duplicated again. This seems to have happened since updating to v2 as not experienced this before on the site.
Please delete “woocommerce” folder in the directory wp-content/themes/woopress/ and reupload it from a new theme package that you downloaded.
Also update all required plugins http://www.8theme.com/download-plugins/ .