[Plugin: Better WordPress reCAPTCHA (support Akismet)]Cannot store multiple keys

I am running the latest version of WP with multisite enabled. Several of my sites are mapped to domains other than the one WP is installed on. I need to be able to store separate public and private keys for each site in my installation, but unless I am doing something wrong, it doesn’t seem like Better WordPress reCAPTCHA can do this. Whenever I change the settings on a site, they change for all my other sites.

Does anyone know a fix for this?

http://wordpress.org/extend/plugins/bwp-recaptcha/