google analytical code deletion

Hello,

I have installed the latest version of the wpmudev google analytical plugin for wordpress, I am running wordpress 3.1 and using domain mapping.

The main site is being tracked and I have created a google account profile for the subdomain. Now I have mapped the the subdomain to a domain and will be using a separate google account.

1. Cannot delete old tracking code: When I enter new code and save, then go back later, old tracking code still remains. The source for the pages also show old tracking code.
2. Obviously the new tracking account is not working.

Has anyone had any problems replacing tracking code? or with mapped domains?

Thanks